Name: Kei Nishikori
Country: Japan
Birthdate: 29.12.89, 35 years
Height: 175 cm
Weight: 65 kg
Right-handed
ATP ranking: 62
TOP ranking's position: 4 (20.03.17, 4730 points)
Points: 928
Prize money: 25650007 $
Matches total: 904
Win: 612
%: 67.7 %
Country: Japan
Birthdate: 29.12.89, 35 years
Height: 175 cm
Weight: 65 kg
Right-handed
ATP ranking: 62
TOP ranking's position: 4 (20.03.17, 4730 points)
Points: 928
Prize money: 25650007 $
Matches total: 904
Win: 612
%: 67.7 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2025 | 12/9 | 9/5 | 2/2 | 1/2 | 0/0 | 0/0 | 0/0 |
| 2024 | 20/12 | 7/5 | 5/4 | 8/2 | 0/0 | 0/1 | 0/0 |
| 2023 | 10/3 | 10/3 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2021 | 27/18 | 15/10 | 8/4 | 2/2 | 0/0 | 2/2 | 0/0 |
| 2020 | 2/4 | 0/0 | 2/4 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2019 | 29/14 | 12/7 | 10/5 | 3/1 | 0/0 | 4/1 | 0/0 |
| 2018 | 48/22 | 11/8 | 11/5 | 21/7 | 0/0 | 5/2 | 0/0 |
| 2017 | 30/14 | 15/6 | 12/6 | 0/0 | 0/0 | 3/2 | 0/0 |
| 2016 | 59/22 | 31/10 | 13/4 | 11/6 | 0/0 | 4/2 | 0/0 |
| 2015 | 55/17 | 27/9 | 16/3 | 8/3 | 0/0 | 4/2 | 0/0 |
| 2014 | 56/16 | 26/9 | 10/2 | 15/3 | 0/0 | 5/2 | 0/0 |
| 2013 | 37/19 | 17/11 | 8/4 | 10/2 | 0/0 | 2/2 | 0/0 |
| 2012 | 39/19 | 21/9 | 7/4 | 4/3 | 0/0 | 7/3 | 0/0 |
| 2011 | 44/23 | 21/10 | 9/5 | 11/5 | 0/0 | 3/3 | 0/0 |
| 2010 | 39/15 | 17/8 | 11/1 | 8/3 | 0/0 | 3/3 | 0/0 |
| 2009 | 4/6 | 2/4 | 0/0 | 1/2 | 1/0 | 0/0 | 0/0 |
| 2008 | 39/19 | 17/7 | 9/3 | 7/4 | 0/0 | 6/5 | 0/0 |
| 2007 | 34/24 | 29/16 | 4/7 | 1/1 | 0/0 | 0/0 | 0/0 |
| 2006 | 26/14 | 18/8 | 8/5 | 0/0 | 0/1 | 0/0 | 0/0 |
| 2005 | 2/2 | 2/1 | 0/0 | 0/0 | 0/0 | 0/1 | 0/0 |
| TOTAL | 612/292 | 307/146 | 145/68 | 111/46 | 1/1 | 48/31 | 0/0 |
| perc. % | 67.7 % | 67.77 % | 68.08 % | 70.7 % | 50 % | 60.76 % | 0 % |
Kei Nishikori / scheduled / last
| no matches found |
Kei Nishikori form / surface: Hard
Kei Nishikori / surface: Hard
| 15.03.25 | 1/2 | Joao Fonseca | Kei Nishikori | 6-3, 6-3 |  | match details |  Phoenix Challenger | Hard |
| 14.03.25 | 1/4 | Kei Nishikori | Flavio Cobolli | 6-2, 4-6, 6-4 |  | match details | ||
| 13.03.25 | 2nd round | Kei Nishikori | Mikhail Kukushkin | 6-3, 2-1, Mikhail Kukushkin - retired | | match details | ||
| 12.03.25 | 1st round | Kei Nishikori | Luca Nardi | 6-4, 6-3 | | match details | ||
| 07.03.25 | 2nd round | Ugo Humbert | Kei Nishikori | 6-4, 6-3 | | match details | Indian Wells | Hard |
| 05.03.25 | 1st round | Kei Nishikori | Jaume Antoni Munar Clar | 6-2, 5-7, 7-63 | | match details | ||
| 11.02.25 | 1st round | Mackenzie Mcdonald | Kei Nishikori | 7-64, 4-6, 7-5 | | match details | Delray Beach | Hard |
| 15.01.25 | 2nd round | Tommy Paul | Kei Nishikori | 6-73, 6-0, 6-3, 6-1 | | match details |  Melbourne | Hard |
| 12.01.25 | 1st round | Kei Nishikori | Thiago Moura Monteiro | 4-6, 6-74, 7-5, 6-2, 6-3 | | match details | ||
| 05.01.25 | fin | Alexandre Muller | Kei Nishikori | 2-6, 6-1, 6-3 | | match details |  Hong Kong | Hard |
| 04.01.25 | 1/2 | Kei Nishikori | Juncheng Shang | 4-3, Juncheng Shang - retired | | match details | ||
| 03.01.25 | 1/4 | Kei Nishikori | Cameron Norrie | 6-3, 3-6, 6-2 | | match details | ||
| 01.01.25 | 2nd round | Kei Nishikori | Karen Khachanov | 4-6, 6-3, 7-5 | | match details | ||
| 31.12.24 | 1st round | Kei Nishikori | Denis Shapovalov | 6-2, 6-3 | | match details | ||
| 04.10.24 | 2nd round | Stefanos Tsitsipas | Kei Nishikori | 7-66, 6-4 | | match details | Shanghai | Hard |
| 02.10.24 | 1st round | Kei Nishikori | Mariano Navone | 3-6, 6-4, 6-3 | | match details | ||
| 29.09.24 | 1/4 | Holger Rune | Kei Nishikori | 3-6, 6-2, 7-5 | | match details |  Tokyo | Hard |
| 28.09.24 | 2nd round | Kei Nishikori | Jordan Thompson | 6-2, 6-3 | | match details | ||
| 26.09.24 | 1st round | Kei Nishikori | Marin Cilic | 6-4, 3-6, 6-3 | | match details | ||
| 19.09.24 | 1st round | Juncheng Shang | Kei Nishikori | 6-4, 6-4 | | match details | Chengdu | Hard |
| 14.09.24 | Kei Nishikori | Nicolas Mejia | 6-4, 6-4 | | match details | Davis Cup | Hard | |
| 10.08.24 | 1/4 | Matteo Arnaldi | Kei Nishikori | 6-4, 7-5 | | match details |  Montreal | Hard |
| 10.08.24 | 3rd round | Kei Nishikori | Nuno Borges | 6-3, 6-4 | | match details | ||
| 08.08.24 | 2nd round | Kei Nishikori | Stefanos Tsitsipas | 6-4, 6-4 | | match details | ||
| 06.08.24 | 1st round | Kei Nishikori | Alex Michelsen | 3-6, 7-5, 6-4 | | match details | ||
| 21.03.24 | 1st round | Sebastian Ofner | Kei Nishikori | 6-3, 6-4 | | match details | Miami | Hard |
| 28.07.23 | 1/4 | Taylor Harry Fritz | Kei Nishikori | 6-4, 6-2 | | match details | Atlanta | Hard |
| 27.07.23 | 2nd round | Kei Nishikori | Juncheng Shang | 6-4, 7-63 | | match details | ||
| 25.07.23 | 1st round | Kei Nishikori | Jordan Thompson | 7-65, 7-65 | | match details | ||
| 14.07.23 | 1/4 | Alex Michelsen | Kei Nishikori | 7-613, 3-6, 6-1 | | match details | Chicago Challenger | Hard |
| 13.07.23 | 2nd round | Kei Nishikori | Skander Mansouri | 7-61, 6-4 | | match details | ||
| 12.07.23 | 1st round | Kei Nishikori | Alexis Galarneau | 7-63, 6-1 | | match details | ||
| 06.07.23 | 2nd round | Denis Kudla | Kei Nishikori | 6-4, 3-6, 6-3 | | match details | Bloomfield Hills | Hard |
| 04.07.23 | 1st round | Kei Nishikori | Adam Walton | 6-1, 6-2 | | match details | ||
| 18.06.23 | fin | Kei Nishikori | Michael Zheng | 6-2, 7-5 | | match details |  Palmas del | Hard |
| 17.06.23 | 1/2 | Kei Nishikori | Gustavo Heide | 6-4, 6-2 | | match details | ||
| 16.06.23 | 1/4 | Kei Nishikori | Adam Walton | 6-4, 6-2 | | match details | ||
| 15.06.23 | 2nd round | Kei Nishikori | Mitchell Krueger | 4-6, 6-3, 6-2 | | match details | ||
| 13.06.23 | 1st round | Kei Nishikori | Christian Langmo | 6-2, 6-4 | | match details | ||
| 09.10.21 | 2nd round | Daniel Evans | Kei Nishikori | 4-6, 6-3, 6-4 | | match details | Indian Wells | Hard |
| 07.10.21 | 1st round | Kei Nishikori | Joao Sousa | 6-75, 6-3, 6-2 | | match details | ||
| 04.09.21 | 3rd round | Novak Djokovic | Kei Nishikori | 6-74, 6-3, 6-3, 6-2 | | match details | New York | Hard |
| 02.09.21 | 2nd round | Kei Nishikori | Mackenzie Mcdonald | 7-63, 6-3, 6-75, 2-6, 6-3 | | match details | ||
| 31.08.21 | 1st round | Kei Nishikori | Salvatore Caruso | 6-1, 6-1, 5-7, 6-3 | | match details | ||
| 11.08.21 | 2nd round | Hubert Hurkacz | Kei Nishikori | Kei Nishikori - walk over | | match details | Toronto | Hard |
| 10.08.21 | 1st round | Kei Nishikori | Miomir Kecmanovic | 6-4, 6-75, 6-2 | | match details | ||
| 07.08.21 | 1/2 | Mackenzie Mcdonald | Kei Nishikori | 6-4, 3-6, 7-5 | | match details | Washington | Hard |
| 06.08.21 | 1/4 | Kei Nishikori | Lloyd Harris | 6-3, 7-5 | | match details | ||
| 05.08.21 | 3rd round | Kei Nishikori | Cameron Norrie | 3-6, 6-3, 6-3 | | match details | ||
| 04.08.21 | 2nd round | Kei Nishikori | Alexander Bublik | 6-2, 7-5 | | match details | ||
| 02.08.21 | 1st round | Kei Nishikori | Sam Querrey | 6-4, 6-3 | | match details | ||
| 29.07.21 | 1/4 | Novak Djokovic | Kei Nishikori | 6-2, 6-0 | | match details | Tokyo | Hard |
| 28.07.21 | 3rd round | Kei Nishikori | Ilya Ivashka | 7-67, 6-0 | | match details | ||
| 27.07.21 | 2nd round | Kei Nishikori | Marcos Giron | 7-65, 3-6, 6-1 | | match details | ||
| 25.07.21 | 1st round | Kei Nishikori | Andrey Rublev | 6-3, 6-4 | | match details | ||
| 29.03.21 | 3rd round | Stefanos Tsitsipas | Kei Nishikori | 6-3, 3-6, 6-1 | | match details | Miami | Hard |
| 27.03.21 | 2nd round | Kei Nishikori | Aljaz Bedene | 7-66, 5-7, 6-4 | | match details | ||
| 18.03.21 | 1/4 | Lloyd Harris | Kei Nishikori | 6-1, 3-6, 6-3 | | match details |  Dubai | Hard |
| 17.03.21 | 3rd round | Kei Nishikori | Aljaz Bedene | 6-4, 6-4 | | match details | ||
| 16.03.21 | 2nd round | Kei Nishikori | David Goffin | 6-3, 7-63 | | match details | ||
| 14.03.21 | 1st round | Kei Nishikori | Reilly Opelka | 3-6, 6-3, 6-4 | | match details | ||
| 08.02.21 | 1st round | Pablo Carreno-Busta | Kei Nishikori | 7-5, 7-64, 6-2 | | match details | Melbourne | Hard |
| 06.02.21 | Diego Sebastian Schwartzman | Kei Nishikori | 6-1, 6-74, 6-0 | | match details | Melbourne | Hard | |
| 03.02.21 | Daniil Medvedev | Kei Nishikori | 6-2, 6-4 | | match details | |||
| 30.08.19 | 3rd round | Alex De Minaur | Kei Nishikori | 6-2, 6-4, 2-6, 6-3 | | match details | New York | Hard |
| 28.08.19 | 2nd round | Kei Nishikori | Bradley Klahn | 6-2, 4-6, 6-3, 7-5 | | match details | ||
| 26.08.19 | 1st round | Kei Nishikori | Marco Trungelliti | 6-1, 4-1, Marco Trungelliti - retired | | match details | ||
| 14.08.19 | 2nd round | Yoshihito Nishioka | Kei Nishikori | 7-62, 6-4 | | match details | Cincinnati | Hard |
| 07.08.19 | 2nd round | Richard Gasquet | Kei Nishikori | 6-76, 6-2, 7-64 | | match details | Montreal | Hard |
| 22.03.19 | 2nd round | Dusan Lajovic | Kei Nishikori | 2-6, 6-2, 6-3 | | match details | Miami | Hard |
| 12.03.19 | 3rd round | Hubert Hurkacz | Kei Nishikori | 4-6, 6-4, 6-3 | | match details | Indian Wells | Hard |
| 10.03.19 | 2nd round | Kei Nishikori | Adrian Mannarino | 6-4, 4-6, 7-64 | | match details | ||
| 27.02.19 | 2nd round | Hubert Hurkacz | Kei Nishikori | 7-5, 5-7, 6-2 | | match details | Dubai | Hard |
| 26.02.19 | 1st round | Kei Nishikori | Benoit Paire | 6-4, 6-3 | | match details | ||
| 23.01.19 | 1/4 | Novak Djokovic | Kei Nishikori | 6-1, 4-1, Kei Nishikori - retired | | match details | Melbourne | Hard |
| 21.01.19 | 4th round | Kei Nishikori | Pablo Carreno-Busta | 6-78, 4-6, 7-64, 6-4, 7-68 | | match details | ||
| 19.01.19 | 3rd round | Kei Nishikori | Joao Sousa | 7-66, 6-1, 6-2 | | match details | ||
| 17.01.19 | 2nd round | Kei Nishikori | Ivo Karlovic | 6-3, 7-66, 5-7, 5-7, 7-67 | | match details | ||
| 15.01.19 | 1st round | Kei Nishikori | Kamil Majchrzak | 3-6, 6-76, 6-0, 6-2, 3-0, Kamil Majchrzak - retired | | match details | ||
| 06.01.19 | fin | Kei Nishikori | Daniil Medvedev | 6-4, 3-6, 6-2 | | match details | Brisbane | Hard |
| 05.01.19 | 1/2 | Kei Nishikori | Jeremy Chardy | 6-2, 6-2 | | match details | ||
| 03.01.19 | 1/4 | Kei Nishikori | Grigor Dimitrov | 7-5, 7-5 | | match details | ||
| 02.01.19 | 2nd round | Kei Nishikori | Denis Kudla | 7-5, 6-2 | | match details | ||
| 12.10.18 | 1/4 | Roger Federer | Kei Nishikori | 6-4, 7-64 | | match details | Shanghai | Hard |
| 11.10.18 | 3rd round | Kei Nishikori | Sam Querrey | 7-67, 6-4 | | match details | ||
| 10.10.18 | 2nd round | Kei Nishikori | Yibing Wu | 3-6, 6-0, 6-3 | | match details | ||
| 07.09.18 | 1/2 | Novak Djokovic | Kei Nishikori | 6-3, 6-4, 6-2 | | match details | New York | Hard |
| 05.09.18 | 1/4 | Kei Nishikori | Marin Cilic | 2-6, 6-4, 7-65, 4-6, 6-4 | | match details | ||
| 03.09.18 | 4th round | Kei Nishikori | Philipp Kohlschreiber | 6-3, 6-2, 7-5 | | match details | ||
| 01.09.18 | 3rd round | Kei Nishikori | Diego Sebastian Schwartzman | 6-4, 6-4, 5-7, 6-1 | | match details | ||
| 30.08.18 | 2nd round | Kei Nishikori | Gael Monfils | 6-2, 5-4, Gael Monfils - retired | | match details | ||
| 28.08.18 | 1st round | Kei Nishikori | Maximilian Marterer | 6-2, 6-2, 6-3 | | match details | ||
| 15.08.18 | 2nd round | Stan Wawrinka | Kei Nishikori | 6-4, 6-4 | | match details | Cincinnati | Hard |
| 13.08.18 | 1st round | Kei Nishikori | Andrey Rublev | 7-5, 6-3 | | match details | ||
| 07.08.18 | 1st round | Robin Haase | Kei Nishikori | 7-5, 6-1 | | match details | Toronto | Hard |
| 03.08.18 | 1/4 | Alexander Zverev | Kei Nishikori | 3-6, 6-1, 6-4 | | match details | Washington | Hard |
| 02.08.18 | 3rd round | Kei Nishikori | Denis Shapovalov | 7-61, 6-3 | | match details | ||
| 01.08.18 | 2nd round | Kei Nishikori | Donald Young | 6-3, 6-4 | | match details | ||
| 25.03.18 | 3rd round | Juan Martin Del Potro | Kei Nishikori | 6-2, 6-2 | | match details | Miami | Hard |
| 23.03.18 | 2nd round | Kei Nishikori | John Millman | 7-64, 4-6, 6-3 | | match details | ||
| 27.02.18 | 1st round | Denis Shapovalov | Kei Nishikori | 6-73, 6-3, 6-1 | | match details |  Acapulco | Hard |
| 23.01.18 | 1st round | Dennis Novikov | Kei Nishikori | 6-3, 3-6, 6-4 | | match details | Newport Beach | Hard |
| 09.08.17 | 2nd round | Gael Monfils | Kei Nishikori | 6-74, 7-5, 7-66 | | match details | Montreal | Hard |
| 05.08.17 | 1/2 | Alexander Zverev | Kei Nishikori | 6-3, 6-4 | | match details | Washington | Hard |
| 04.08.17 | 1/4 | Kei Nishikori | Tommy Paul | 3-6, 7-68, 6-4 | | match details | ||
| 03.08.17 | 3rd round | Kei Nishikori | Juan Martin Del Potro | 6-4, 7-5 | | match details | ||
| 01.08.17 | 2nd round | Kei Nishikori | Donald Young | 6-3, 4-6, 7-65 | | match details | ||
| 29.03.17 | 1/4 | Fabio Fognini | Kei Nishikori | 6-4, 6-2 | | match details | Miami | Hard |
| 28.03.17 | 4th round | Kei Nishikori | Federico Delbonis | 6-3, 4-6, 6-3 | | match details | ||
| 26.03.17 | 3rd round | Kei Nishikori | Fernando Verdasco | 7-62, 6-75, 6-1 | | match details | ||
| 24.03.17 | 2nd round | Kei Nishikori | Kevin Anderson | 6-4, 6-3 | | match details | ||
| 17.03.17 | 1/4 | Jack Sock | Kei Nishikori | 6-3, 2-6, 6-2 | | match details | Indian Wells | Hard |
| 15.03.17 | 4th round | Kei Nishikori | Donald Young | 6-2, 6-4 | | match details | ||
| 14.03.17 | 3rd round | Kei Nishikori | Gilles Muller | 6-2, 6-2 | | match details | ||
| 12.03.17 | 2nd round | Kei Nishikori | Daniel Evans | 6-3, 6-4 | | match details | ||
| 22.01.17 | 4th round | Roger Federer | Kei Nishikori | 6-74, 6-4, 6-1, 4-6, 6-3 | | match details | Melbourne | Hard |
| 20.01.17 | 3rd round | Kei Nishikori | Lukas Lacko | 6-4, 6-4, 6-4 | | match details | ||
| 18.01.17 | 2nd round | Kei Nishikori | Jeremy Chardy | 6-3, 6-4, 6-3 | | match details | ||
| 16.01.17 | 1st round | Kei Nishikori | Andrey Kuznetsov | 5-7, 6-1, 6-4, 6-76, 6-2 | | match details | ||
| 08.01.17 | fin | Grigor Dimitrov | Kei Nishikori | 6-2, 2-6, 6-3 | | match details | Brisbane | Hard |
| 07.01.17 | 1/2 | Kei Nishikori | Stan Wawrinka | 7-63, 6-3 | | match details | ||
| 06.01.17 | 1/4 | Kei Nishikori | Jordan Thompson | 6-1, 6-1 | | match details | ||
| 04.01.17 | 2nd round | Kei Nishikori | Jared Donaldson | 4-6, 6-4, 6-3 | | match details | ||
| 05.10.16 | 2nd round | Joao Sousa | Kei Nishikori | 3-4, Kei Nishikori - retired | | match details | Tokyo | Hard |
| 03.10.16 | 1st round | Kei Nishikori | Donald Young | 4-6, 6-2, 6-2 | | match details | ||
| 09.09.16 | 1/2 | Stan Wawrinka | Kei Nishikori | 4-6, 7-5, 6-4, 6-2 | | match details | New York | Hard |
| 07.09.16 | 1/4 | Kei Nishikori | Andy Murray | 1-6, 6-4, 4-6, 6-1, 7-5 | | match details | ||
| 05.09.16 | 4th round | Kei Nishikori | Ivo Karlovic | 6-3, 6-4, 7-64 | | match details | ||
| 03.09.16 | 3rd round | Kei Nishikori | Nicolas Mahut | 4-6, 6-1, 6-2, 6-2 | | match details | ||
| 01.09.16 | 2nd round | Kei Nishikori | Karen Khachanov | 6-4, 4-6, 6-4, 6-3 | | match details | ||
| 30.08.16 | 1st round | Kei Nishikori | Benjamin Becker | 6-1, 6-1, 3-6, 6-3 | | match details | ||
| 18.08.16 | 3rd round | Bernard Tomic | Kei Nishikori | 7-61, 7-65 | | match details | Cincinnati | Hard |
| 17.08.16 | 2nd round | Kei Nishikori | Mikhail Youzhny | 6-3, 6-2 | | match details | ||
| 14.08.16 | bronze | Kei Nishikori | Rafael Nadal | 6-2, 6-71, 6-3 | | match details |  Rio de | Hard |
| 13.08.16 | 1/2 | Andy Murray | Kei Nishikori | 6-1, 6-4 | | match details | ||
| 12.08.16 | 1/4 | Kei Nishikori | Gael Monfils | 7-64, 4-6, 7-66 | | match details | ||
| 11.08.16 | 3rd round | Kei Nishikori | Andrej Martin | 6-2, 6-2 | | match details | ||
| 08.08.16 | 2nd round | Kei Nishikori | John Millman | 7-64, 6-4 | | match details | ||
| 06.08.16 | 1st round | Kei Nishikori | Albert Ramos-Vinolas | 6-2, 6-4 | | match details | ||
| 31.07.16 | fin | Novak Djokovic | Kei Nishikori | 6-3, 7-5 | | match details | Toronto | Hard |
| 30.07.16 | 1/2 | Kei Nishikori | Stan Wawrinka | 7-66, 6-1 | | match details | ||
| 29.07.16 | 1/4 | Kei Nishikori | Grigor Dimitrov | 6-3, 3-6, 6-2 | | match details | ||
| 28.07.16 | 3rd round | Kei Nishikori | Rajeev Ram | 6-3, 6-4 | | match details | ||
| 27.07.16 | 2nd round | Kei Nishikori | Dennis Novikov | 6-4, 7-5 | | match details | ||
| 03.04.16 | fin | Novak Djokovic | Kei Nishikori | 6-3, 6-3 | | match details | Miami | Hard |
| 01.04.16 | 1/2 | Kei Nishikori | Nick Kyrgios | 6-3, 7-5 | | match details | ||
| 31.03.16 | 1/4 | Kei Nishikori | Gael Monfils | 4-6, 6-3, 7-63 | | match details | ||
| 29.03.16 | 4th round | Kei Nishikori | Roberto Bautista Agut | 6-2, 6-4 | | match details | ||
| 28.03.16 | 3rd round | Kei Nishikori | Alexandr Dolgopolov | 6-2, 6-2 | | match details | ||
| 26.03.16 | 2nd round | Kei Nishikori | Pierre-Hugues Herbert | 6-2, 7-64 | | match details | ||
| 18.03.16 | 1/4 | Rafael Nadal | Kei Nishikori | 6-4, 6-3 | | match details | Indian Wells | Hard |
| 16.03.16 | 4th round | Kei Nishikori | John Isner | 1-6, 7-62, 7-65 | | match details | ||
| 15.03.16 | 3rd round | Kei Nishikori | Steve Johnson | 7-66, 7-65 | | match details | ||
| 13.03.16 | 2nd round | Kei Nishikori | Mikhail Kukushkin | 6-3, 6-3 | | match details | ||
| 24.02.16 | 2nd round | Sam Querrey | Kei Nishikori | 6-4, 6-3 | | match details | Acapulco | Hard |
| 22.02.16 | 1st round | Kei Nishikori | Thiemo de Bakker | 6-0, 6-3 | | match details | ||
| 26.01.16 | 1/4 | Novak Djokovic | Kei Nishikori | 6-3, 6-2, 6-4 | | match details | Melbourne | Hard |
| 24.01.16 | 4th round | Kei Nishikori | Jo-Wilfried Tsonga | 6-4, 6-2, 6-4 | | match details | ||
| 22.01.16 | 3rd round | Kei Nishikori | Guillermo Garcia-Lopez | 7-5, 2-6, 6-3, 6-4 | | match details | ||
| 20.01.16 | 2nd round | Kei Nishikori | Austin Krajicek | 6-3, 7-65, 6-3 | | match details | ||
| 18.01.16 | 1st round | Kei Nishikori | Philipp Kohlschreiber | 6-4, 6-3, 6-3 | | match details | ||
| 13.01.16 | 2nd round | Kei Nishikori | Omar Jasika | 6-1, 6-7, 10-4 | | match details | Kooyong | Hard |
| 08.01.16 | 1/4 | Bernard Tomic | Kei Nishikori | 6-3, 1-6, 6-3 | | match details | Brisbane | Hard |
| 06.01.16 | 2nd round | Kei Nishikori | Mikhail Kukushkin | 6-3, 6-4 | | match details | ||
| 15.10.15 | 3rd round | Kevin Anderson | Kei Nishikori | 7-610, 7-63 | | match details | Shanghai | Hard |
| 14.10.15 | 2nd round | Kei Nishikori | Nick Kyrgios | 1-6, 6-4, 6-4 | | match details | ||
| 10.10.15 | 1/2 | Benoit Paire | Kei Nishikori | 1-6, 6-4, 6-2 | | match details | Tokyo | Hard |
| 09.10.15 | 1/4 | Kei Nishikori | Marin Cilic | 3-6, 7-5, 6-3 | | match details | ||
| 07.10.15 | 2nd round | Kei Nishikori | Sam Querrey | 7-63, 6-3 | | match details | ||
| 05.10.15 | 1st round | Kei Nishikori | Borna Coric | 2-6, 6-1, 6-2 | | match details | ||
| 31.08.15 | 1st round | Benoit Paire | Kei Nishikori | 6-4, 3-6, 4-6, 7-66, 6-4 | | match details | New York | Hard |
| 15.08.15 | 1/2 | Andy Murray | Kei Nishikori | 6-3, 6-0 | | match details | Montreal | Hard |
| 14.08.15 | 1/4 | Kei Nishikori | Rafael Nadal | 6-2, 6-4 | | match details | ||
| 13.08.15 | 3rd round | Kei Nishikori | David Goffin | 6-4, 6-4 | | match details | ||
| 12.08.15 | 2nd round | Kei Nishikori | Pablo Andujar | 6-3, 6-3 | | match details | ||
| 09.08.15 | fin | Kei Nishikori | John Isner | 4-6, 6-4, 6-4 | | match details | Washington | Hard |
| 08.08.15 | 1/2 | Kei Nishikori | Marin Cilic | 3-6, 6-1, 6-4 | | match details | ||
| 07.08.15 | 1/4 | Kei Nishikori | Samuel Groth | 6-4, 6-4 | | match details | ||
| 06.08.15 | 3rd round | Kei Nishikori | Leonardo Mayer | 6-4, 6-4 | | match details | ||
| 04.08.15 | 2nd round | Kei Nishikori | James Duckworth | 6-78, 6-1, 6-4 | | match details | ||
| 02.04.15 | 1/4 | John Isner | Kei Nishikori | 6-4, 6-3 | | match details | Miami | Hard |
| 31.03.15 | 4th round | Kei Nishikori | David Goffin | 6-1, 6-2 | | match details | ||
| 30.03.15 | 3rd round | Kei Nishikori | Viktor Troicki | 6-2, 6-2 | | match details | ||
| 28.03.15 | 2nd round | Kei Nishikori | Mikhail Youzhny | 6-2, 6-1 | | match details | ||
| 18.03.15 | 4th round | Feliciano Lopez | Kei Nishikori | 6-4, 7-62 | | match details | Indian Wells | Hard |
| 16.03.15 | 3rd round | Kei Nishikori | Fernando Verdasco | 6-76, 6-1, 6-4 | | match details | ||
| 14.03.15 | 2nd round | Kei Nishikori | Ryan Harrison | 6-4, 6-4 | | match details | ||
| 28.02.15 | fin | David Ferrer | Kei Nishikori | 6-3, 7-5 | | match details | Acapulco | Hard |
| 27.02.15 | 1/2 | Kei Nishikori | Kevin Anderson | 6-2, 3-6, 6-3 | | match details | ||
| 26.02.15 | 1/4 | Kei Nishikori | Alexandr Dolgopolov | 6-4, 6-4 | | match details | ||
| 25.02.15 | 2nd round | Kei Nishikori | Yen-Hsun Lu | 6-1, 6-3 | | match details | ||
| 24.02.15 | 1st round | Kei Nishikori | Alejandro Gonzalez | 6-3, 7-5 | | match details | ||
| 28.01.15 | 1/4 | Stan Wawrinka | Kei Nishikori | 6-3, 6-4, 7-66 | | match details | Melbourne | Hard |
| 26.01.15 | 4th round | Kei Nishikori | David Ferrer | 6-3, 6-3, 6-3 | | match details | ||
| 24.01.15 | 3rd round | Kei Nishikori | Steve Johnson | 6-77, 6-1, 6-2, 6-3 | | match details | ||
| 22.01.15 | 2nd round | Kei Nishikori | Ivan Dodig | 4-6, 7-5, 6-2, 7-60 | | match details | ||
| 20.01.15 | 1st round | Kei Nishikori | Nicolas Almagro | 6-4, 7-61, 6-2 | | match details | ||
| 10.01.15 | 1/2 | Milos Raonic | Kei Nishikori | 6-74, 7-64, 7-64 | | match details | Brisbane | Hard |
| 09.01.15 | 1/4 | Kei Nishikori | Bernard Tomic | 6-0, 6-4 | | match details | ||
| 07.01.15 | 2nd round | Kei Nishikori | Steve Johnson | 6-4, 7-5 | | match details | ||
| 08.10.14 | 2nd round | Jack Sock | Kei Nishikori | 7-65, 6-4 | | match details | Shanghai | Hard |
| 05.10.14 | fin | Kei Nishikori | Milos Raonic | 7-65, 4-6, 6-4 | | match details | Tokyo | Hard |
| 04.10.14 | 1/2 | Kei Nishikori | Benjamin Becker | 4-6, 6-0, 7-62 | | match details | ||
| 03.10.14 | 1/4 | Kei Nishikori | Jeremy Chardy | 6-4, 6-2 | | match details | ||
| 02.10.14 | 2nd round | Kei Nishikori | Donald Young | 6-4, 7-64 | | match details | ||
| 01.10.14 | 1st round | Kei Nishikori | Ivan Dodig | 6-3, 6-4 | | match details | ||
| 08.09.14 | fin | Marin Cilic | Kei Nishikori | 6-3, 6-3, 6-3 | | match details | New York | Hard |
| 06.09.14 | 1/2 | Kei Nishikori | Novak Djokovic | 6-4, 1-6, 7-64, 6-3 | | match details | ||
| 03.09.14 | 1/4 | Kei Nishikori | Stan Wawrinka | 3-6, 7-5, 7-67, 6-75, 6-4 | | match details | ||
| 01.09.14 | 4th round | Kei Nishikori | Milos Raonic | 4-6, 7-64, 6-76, 7-5, 6-4 | | match details | ||
| 30.08.14 | 3rd round | Kei Nishikori | Leonardo Mayer | 6-4, 6-2, 6-3 | | match details | ||
| 29.08.14 | 2nd round | Kei Nishikori | Pablo Andujar | 6-4, 6-1, Pablo Andujar - retired | | match details | ||
| 26.08.14 | 1st round | Kei Nishikori | Wayne Odesnik | 6-2, 6-4, 6-2 | | match details | ||
| 01.08.14 | 1/4 | Richard Gasquet | Kei Nishikori | 6-1, 6-4 | | match details | Washington | Hard |
| 31.07.14 | 3rd round | Kei Nishikori | Lukas Lacko | 6-2, 2-6, 6-3 | | match details | ||
| 30.07.14 | 2nd round | Kei Nishikori | Sam Querrey | 6-4, 5-7, 6-4 | | match details | ||
| 28.03.14 | 1/2 | Novak Djokovic | Kei Nishikori | Kei Nishikori - walk over | | match details | Miami | Hard |
| 26.03.14 | 1/4 | Kei Nishikori | Roger Federer | 3-6, 7-5, 6-4 | | match details | ||
| 25.03.14 | 4th round | Kei Nishikori | David Ferrer | 7-67, 2-6, 7-69 | | match details | ||
| 23.03.14 | 3rd round | Kei Nishikori | Grigor Dimitrov | 7-61, 7-5 | | match details | ||
| 21.03.14 | 2nd round | Kei Nishikori | Marinko Matosevic | 6-4, 6-1 | | match details | ||
| 10.03.14 | 3rd round | Tommy Haas | Kei Nishikori | 7-63, 6-2 | | match details | Indian Wells | Hard |
| 08.03.14 | 2nd round | Kei Nishikori | Santiago Giraldo | 6-1, 6-3 | | match details | ||
| 20.02.14 | 2nd round | Teimuraz Gabashvili | Kei Nishikori | 4-2, Kei Nishikori - retired | | match details | Delray Beach | Hard |
| 18.02.14 | 1st round | Kei Nishikori | Gastao Elias | 6-1, 5-7, 6-2 | | match details | ||
| 20.01.14 | 4th round | Rafael Nadal | Kei Nishikori | 7-63, 7-5, 7-63 | | match details | Melbourne | Hard |
| 18.01.14 | 3rd round | Kei Nishikori | Donald Young | 7-5, 6-1, 6-0 | | match details | ||
| 16.01.14 | 2nd round | Kei Nishikori | Dusan Lajovic | 6-1, 6-1, 7-63 | | match details | ||
| 14.01.14 | 1st round | Kei Nishikori | Marinko Matosevic | 6-3, 5-7, 6-2, 4-6, 6-2 | | match details | ||
| 11.01.14 | fin | Kei Nishikori | Tomas Berdych | 6-4, 7-5 | | match details | Kooyong | Hard |
| 09.01.14 | 2nd round | Tomas Berdych | Kei Nishikori | 6-4, 6-1 | | match details | ||
| 08.01.14 | 1st round | Kei Nishikori | Grigor Dimitrov | 7-6, 6-4 | | match details | ||
| 04.01.14 | 1/2 | Lleyton Hewitt | Kei Nishikori | 5-7, 6-4, 6-3 | | match details | Brisbane | Hard |
| 03.01.14 | 1/4 | Kei Nishikori | Marin Cilic | 6-4, 5-7, 6-2 | | match details | ||
| 01.01.14 | 2nd round | Kei Nishikori | Matthew Ebden | 6-2, 6-4 | | match details | ||
| 10.10.13 | 3rd round | Jo-Wilfried Tsonga | Kei Nishikori | 7-65, 6-0 | | match details | Shanghai | Hard |
| 09.10.13 | 2nd round | Kei Nishikori | Jurgen Melzer | 6-4, 3-6, 6-1 | | match details | ||
| 08.10.13 | 1st round | Kei Nishikori | Grigor Dimitrov | 6-3, 6-4 | | match details | ||
| 04.10.13 | 1/4 | Nicolas Almagro | Kei Nishikori | 7-62, 5-7, 6-3 | | match details | Tokyo | Hard |
| 03.10.13 | 2nd round | Kei Nishikori | Feliciano Lopez | 7-64, 6-0 | | match details | ||
| 01.10.13 | 1st round | Kei Nishikori | Jurgen Melzer | 6-74, 7-5, 6-2 | | match details | ||
| 26.08.13 | 1st round | Daniel Evans | Kei Nishikori | 6-4, 6-4, 6-2 | | match details | New York | Hard |
| 13.08.13 | 1st round | Feliciano Lopez | Kei Nishikori | 6-4, 7-64 | | match details | Cincinnati | Hard |
| 08.08.13 | 3rd round | Richard Gasquet | Kei Nishikori | 1-6, 6-3, 6-3 | | match details | Montreal | Hard |
| 06.08.13 | 2nd round | Kei Nishikori | Andreas Seppi | 4-6, 7-5, 6-1 | | match details | ||
| 05.08.13 | 1st round | Kei Nishikori | Peter Polansky | 4-6, 6-4, 6-2 | | match details | ||
| 01.08.13 | 3rd round | Marcos Baghdatis | Kei Nishikori | 6-1, 6-2 | | match details | Washington | Hard |
| 01.08.13 | 2nd round | Kei Nishikori | Jack Sock | 7-5, 6-2 | | match details | ||
| 26.03.13 | 4th round | David Ferrer | Kei Nishikori | 6-4, 6-2 | | match details | Miami | Hard |
| 24.03.13 | 3rd round | Kei Nishikori | Xavier Malisse | 6-2, 7-5 | | match details | ||
| 22.03.13 | 2nd round | Kei Nishikori | Victor Hanescu | 6-3, 6-3 | | match details | ||
| 12.03.13 | 3rd round | Carlos Berlocq | Kei Nishikori | 6-2, 6-2 | | match details | Indian Wells | Hard |
| 10.03.13 | 2nd round | Kei Nishikori | Philipp Petzschner | 6-3, 6-2 | | match details | ||
| 26.02.13 | 1st round | Ivo Karlovic | Kei Nishikori | 5-4, Kei Nishikori - retired | | match details | Delray Beach | Hard |
| 20.01.13 | 4th round | David Ferrer | Kei Nishikori | 6-2, 6-1, 6-4 | | match details | Melbourne | Hard |
| 18.01.13 | 3rd round | Kei Nishikori | Evgeny Donskoy | 7-63, 6-2, 6-3 | | match details | ||
| 16.01.13 | 2nd round | Kei Nishikori | Carlos Berlocq | 7-64, 6-4, 6-1 | | match details | ||
| 14.01.13 | 1st round | Kei Nishikori | Victor Hanescu | 6-75, 6-3, 6-1, 6-3 | | match details | ||
| 11.01.13 | 3rd round | Kei Nishikori | Paul-Henri Mathieu | 6-0, 4-6, 6-3 | | match details | Kooyong | Hard |
| 05.01.13 | 1/2 | Andy Murray | Kei Nishikori | 6-4, 2-0, Kei Nishikori - retired | | match details | Brisbane | Hard |
| 04.01.13 | 1/4 | Kei Nishikori | Alexandr Dolgopolov | 6-4, 7-63 | | match details | ||
| 02.01.13 | 2nd round | Kei Nishikori | Tommy Robredo | 6-3, 6-3 | | match details | ||
| 31.12.12 | 1st round | Kei Nishikori | Marinko Matosevic | 7-5, 6-2 | | match details | ||
| 10.10.12 | 2nd round | Sam Querrey | Kei Nishikori | 2-6, 6-1, 6-4 | | match details | Shanghai | Hard |
| 09.10.12 | 1st round | Kei Nishikori | Di Wu | 6-2, 6-4 | | match details | ||
| 07.10.12 | fin | Kei Nishikori | Milos Raonic | 7-65, 3-6, 6-0 | | match details | Tokyo | Hard |
| 06.10.12 | 1/2 | Kei Nishikori | Marcos Baghdatis | 6-2, 6-2 | | match details | ||
| 05.10.12 | 1/4 | Kei Nishikori | Tomas Berdych | 7-5, 6-4 | | match details | ||
| 04.10.12 | 2nd round | Kei Nishikori | Tommy Robredo | 5-7, 6-1, 6-0 | | match details | ||
| 02.10.12 | 1st round | Kei Nishikori | Go Soeda | 4-6, 6-2, 6-3 | | match details | ||
| 16.09.12 | Kei Nishikori | Dudi Sela | 6-3, 3-6, 4-6, 6-4, 7-5 | | match details | Davis Cup | Hard | |
| 01.09.12 | 3rd round | Marin Cilic | Kei Nishikori | 6-3, 6-4, 6-73, 6-3 | | match details | New York | Hard |
| 30.08.12 | 2nd round | Kei Nishikori | Tim Smyczek | 6-2, 6-2, 6-4 | | match details | ||
| 27.08.12 | 1st round | Kei Nishikori | Guido Andreozzi | 6-1, 6-2, 6-4 | | match details | ||
| 16.08.12 | 3rd round | Stan Wawrinka | Kei Nishikori | 6-3, 6-3 | | match details | Cincinnati | Hard |
| 15.08.12 | 2nd round | Kei Nishikori | James Blake | 2-6, 6-4, 6-4 | | match details | ||
| 14.08.12 | 1st round | Kei Nishikori | Marcel Granollers | 6-1, 6-2 | | match details | ||
| 08.08.12 | 2nd round | Sam Querrey | Kei Nishikori | 6-2, 6-3 | | match details | Toronto | Hard |
| 20.07.12 | 1/4 | Go Soeda | Kei Nishikori | 6-2, 6-1 | | match details | Atlanta | Hard |
| 18.07.12 | 2nd round | Kei Nishikori | Ricardas Berankis | 6-4, 6-77, 6-4 | | match details | ||
| 27.03.12 | 4th round | Rafael Nadal | Kei Nishikori | 6-4, 6-4 | | match details | Miami | Hard |
| 25.03.12 | 3rd round | Kei Nishikori | Lukas Rosol | 6-4, 6-2 | | match details | ||
| 23.03.12 | 2nd round | Kei Nishikori | Lukas Lacko | 6-3, 6-3 | | match details | ||
| 10.03.12 | 2nd round | Santiago Giraldo | Kei Nishikori | 7-5, 6-2 | | match details | Indian Wells | Hard |
| 25.01.12 | 1/4 | Andy Murray | Kei Nishikori | 6-3, 6-3, 6-1 | | match details | Melbourne | Hard |
| 23.01.12 | 4th round | Kei Nishikori | Jo-Wilfried Tsonga | 2-6, 6-2, 6-1, 3-6, 6-3 | | match details | ||
| 21.01.12 | 3rd round | Kei Nishikori | Julien Benneteau | 4-6, 7-63, 7-64, 6-3 | | match details | ||
| 19.01.12 | 2nd round | Kei Nishikori | Matthew Ebden | 3-6, 1-6, 6-4, 6-1, 6-1 | | match details | ||
| 17.01.12 | 1st round | Kei Nishikori | Stephane Robert | 6-1, 7-67, 6-0 | | match details | ||
| 13.01.12 | bronze | Kei Nishikori | Andy Roddick | 6-3, 6-3 | | match details | Kooyong | Hard |
| 12.01.12 | 1st round | Kei Nishikori | Jo-Wilfried Tsonga | 1-6, 6-4, 6-1 | | match details | ||
| 04.01.12 | 2nd round | Marcos Baghdatis | Kei Nishikori | 6-3, 6-4 | | match details | Brisbane | Hard |
| 03.01.12 | 1st round | Kei Nishikori | Cedrik-Marcel Stebe | 3-6, 6-1, 6-4 | | match details | ||
| 15.10.11 | 1/2 | Andy Murray | Kei Nishikori | 6-3, 6-0 | | match details | Shanghai | Hard |
| 14.10.11 | 1/4 | Kei Nishikori | Alexandr Dolgopolov | 6-4, 6-3 | | match details | ||
| 13.10.11 | 3rd round | Kei Nishikori | Santiago Giraldo | 7-66, 4-6, 6-3 | | match details | ||
| 12.10.11 | 2nd round | Kei Nishikori | Jo-Wilfried Tsonga | 6-71, 6-4, 6-4 | | match details | ||
| 11.10.11 | 1st round | Kei Nishikori | Robin Haase | 0-6, 7-5, 7-65 | | match details | ||
| 04.10.11 | 1st round | David Ferrer | Kei Nishikori | 6-4, 6-3 | | match details | Tokyo | Hard |
| 18.09.11 | Kei Nishikori | Vishnu Vardhan | 7-5, 6-3, 6-3 | | match details | Davis Cup | Hard | |
| 16.09.11 | Kei Nishikori | Rohan Bopanna | 6-3, 6-2, 6-2 | | match details | |||
| 29.08.11 | 1st round | Flavio Cipolla | Kei Nishikori | 6-4, 6-2, Kei Nishikori - retired | | match details | New York | Hard |
| 24.08.11 | 3rd round | Juan Monaco | Kei Nishikori | 6-0, 6-3 | | match details | Winston Salem | Hard |
| 23.08.11 | 2nd round | Kei Nishikori | Pablo Andujar | 7-63, 6-2 | | match details | ||
| 22.08.11 | 1st round | Kei Nishikori | Gilles Muller | 1-6, 6-4, 7-65 | | match details | ||
| 21.08.11 | qual. | Kei Nishikori | Carsten Ball | 6-3, 6-4 | | match details | ||
| 20.08.11 | q 2 | Kei Nishikori | Daniel Yoo | 6-1, 6-4 | | match details | ||
| 20.08.11 | q 1 | Kei Nishikori | Kevin Kim | 6-2, 6-1 | | match details | ||
| 15.08.11 | 1st round | David Nalbandian | Kei Nishikori | 6-4, 6-4 | | match details | Cincinnati | Hard |
| 14.08.11 | qual. | Kei Nishikori | Mikhail Kukushkin | 6-3, 6-4 | | match details | ||
| 13.08.11 | q 1 | Kei Nishikori | Joao Souza | 6-1, 6-4 | | match details | ||
| 26.03.11 | 2nd round | Rafael Nadal | Kei Nishikori | 6-4, 6-4 | | match details | Miami | Hard |
| 24.03.11 | 1st round | Kei Nishikori | Jeremy Chardy | 7-65, 6-2 | | match details | ||
| 11.03.11 | 1st round | Igor Andreev | Kei Nishikori | 6-4, 6-72, 6-4 | | match details | Indian Wells | Hard |
| 26.02.11 | 1/2 | Janko Tipsarevic | Kei Nishikori | 6-4, 6-4 | | match details | Delray Beach | Hard |
| 25.02.11 | 1/4 | Kei Nishikori | Ryan Sweeting | 6-75, 6-2, 6-4 | | match details | ||
| 23.02.11 | 2nd round | Kei Nishikori | James Blake | 6-3, 6-4 | | match details | ||
| 22.02.11 | 1st round | Kei Nishikori | Brian Dabul | 6-2, 7-65 | | match details | ||
| 21.01.11 | 3rd round | Fernando Verdasco | Kei Nishikori | 6-2, 6-4, 6-3 | | match details | Melbourne | Hard |
| 19.01.11 | 2nd round | Kei Nishikori | Florian Mayer | 6-4, 6-3, 0-6, 6-3 | | match details | ||
| 17.01.11 | 1st round | Kei Nishikori | Fabio Fognini | 6-1, 6-4, 6-74, 6-4 | | match details | ||
| 07.01.11 | 1/4 | Janko Tipsarevic | Kei Nishikori | 6-4, 6-4 | | match details |  Chennai | Hard |
| 06.01.11 | 2nd round | Kei Nishikori | Alejandro Falla | 4-6, 6-3, 6-2 | | match details | ||
| 03.01.11 | 1st round | Kei Nishikori | Marin Cilic | 4-6, 7-60, 6-2 | | match details | ||
| 09.10.10 | q 1 | Benjamin Becker | Kei Nishikori | 7-5, 4-6, 7-64 | | match details | Shanghai | Hard |
| 05.10.10 | 1st round | Viktor Troicki | Kei Nishikori | 6-4, 6-2 | | match details | Tokyo | Hard |
| 04.09.10 | 3rd round | Albert Montanes | Kei Nishikori | 6-2, 2-1, Kei Nishikori - retired | | match details | New York | Hard |
| 02.09.10 | 2nd round | Kei Nishikori | Marin Cilic | 5-7, 7-66, 3-6, 7-63, 6-1 | | match details | ||
| 30.08.10 | 1st round | Kei Nishikori | Evgeny Korolev | 7-60, 5-2, Evgeny Korolev - retired | | match details | ||
| 28.08.10 | qual. | Kei Nishikori | Frank Dancevic | 6-4, 6-1 | | match details | ||
| 27.08.10 | q 2 | Kei Nishikori | Alexander Kudryavtsev | 6-3, 7-61 | | match details | ||
| 26.08.10 | q 1 | Kei Nishikori | Paul Capdeville | 6-3, 5-7, 6-2 | | match details | ||
| 16.08.10 | fin | Kei Nishikori | Robert Kendrick | 6-3, 7-64 | | match details | Binghamton Challenger | Hard |
| 14.08.10 | 1/2 | Kei Nishikori | Alex Jr. Bogomolov | 7-64, 6-1 | | match details | ||
| 13.08.10 | 2nd round | Kei Nishikori | Benjamin Balleret | 6-3, 6-4 | | match details | ||
| 13.08.10 | 1/4 | Kei Nishikori | Brian Dabul | 7-65, 6-2 | | match details | ||
| 10.08.10 | 1st round | Kei Nishikori | Kevin Kim | 7-64, 3-6, 6-2 | | match details | ||
| 02.08.10 | 1st round | Igor Kunitsyn | Kei Nishikori | 6-2, 6-3 | | match details | Washington | Hard |
| 01.08.10 | qual. | Kei Nishikori | Kevin Anderson | 4-6, 7-64, 6-4 | | match details | ||
| 31.07.10 | q 1 | Kei Nishikori | Junior A. Ore | 6-3, 6-1 | | match details | ||
| 25.07.10 | q 2 | Tim Smyczek | Kei Nishikori | 6-3, 6-4 | | match details | Los Angeles | Hard |
| 24.07.10 | q 1 | Kei Nishikori | Lester Cook | 7-62, 6-4 | | match details | ||
| 22.04.10 | 1/4 | Robby Ginepri | Kei Nishikori | 6-2, 6-4 | | match details | Tallahassee Challenger | Hard |
| 21.04.10 | 2nd round | Kei Nishikori | Tatsuma Ito | 4-6, 6-4, 6-3 | | match details | ||
| 19.04.10 | 1st round | Kei Nishikori | Jesse Levine | 6-3, 6-75, 7-63 | | match details | ||
| 16.04.10 | 1/4 | Tobias Kamke | Kei Nishikori | 6-4, 6-1 | | match details | Baton Rouge | Hard |
| 14.04.10 | 2nd round | Kei Nishikori | Rajeev Ram | 6-3, 6-73, 6-3 | | match details | ||
| 12.04.10 | 1st round | Kei Nishikori | Brendan Evans | 3-6, 6-1, 6-1 | | match details | ||
| 24.02.10 | 1st round | Benjamin Becker | Kei Nishikori | 6-3, 1-6, 6-0 | | match details | Delray Beach | Hard |
| 12.03.09 | 1st round | Ivan Ljubicic | Kei Nishikori | 6-3, 6-3 | | match details | Indian Wells | Hard |
| 20.01.09 | 1st round | Jurgen Melzer | Kei Nishikori | 7-5, 6-2, 6-1 | | match details | Melbourne | Hard |
| 12.01.09 | 1st round | Juan Carlos Ferrero | Kei Nishikori | 5-3, Kei Nishikori - retired | | match details |  Auckland | Hard |
| 08.01.09 | 1/4 | Paul-Henri Mathieu | Kei Nishikori | 6-3, 6-4 | | match details | Brisbane | Hard |
| 07.01.09 | 2nd round | Kei Nishikori | Tomas Berdych | 7-67, 6-3 | | match details | ||
| 06.01.09 | 1st round | Kei Nishikori | Bobby Reynolds | 6-3, 6-2 | | match details | ||
| 02.10.08 | 3rd round | Richard Gasquet | Kei Nishikori | 6-1, 6-2 | | match details | Tokyo | Hard |
| 01.10.08 | 2nd round | Kei Nishikori | Guillermo Garcia-Lopez | 6-4, 6-4 | | match details | ||
| 30.09.08 | 1st round | Kei Nishikori | Robert Kendrick | 7-63, 6-75, 6-2 | | match details | ||
| 01.09.08 | 4th round | Juan Martin Del Potro | Kei Nishikori | 6-3, 6-4, 6-3 | | match details | New York | Hard |
| 30.08.08 | 3rd round | Kei Nishikori | David Ferrer | 6-4, 6-4, 3-6, 2-6, 7-5 | | match details | ||
| 28.08.08 | 2nd round | Kei Nishikori | Roko Karanusic | 6-1, 7-5, Roko Karanusic - retired | | match details | ||
| 25.08.08 | 1st round | Kei Nishikori | Juan Monaco | 6-2, 6-2, 5-7, 6-2 | | match details | ||
| 11.08.08 | 1st round | Rainer Schuettler | Kei Nishikori | 6-4, 6-75, 6-3 | | match details | Beijing | Hard |
| 28.05.08 | 2nd round | Illya Marchenko | Kei Nishikori | 6-4, 6-2 | | match details |  Izmir | Hard |
| 27.05.08 | 1st round | Kei Nishikori | Ricardo Mello | 6-4, 6-2 | | match details | ||
| 26.03.08 | 1st round | Albert Montanes | Kei Nishikori | 7-5, 6-2 | | match details | Miami | Hard |
| 20.03.08 | 2nd round | Sebastien Grosjean | Kei Nishikori | 6-2, 6-76, 6-4 | | match details | Sunrise | Hard |
| 19.03.08 | 1st round | Kei Nishikori | Nicolas Massu | 6-4, 6-4 | | match details | ||
| 14.03.08 | 1st round | Marin Cilic | Kei Nishikori | 6-2, 6-4 | | match details | Indian Wells | Hard |
| 12.03.08 | qual. | Kei Nishikori | Frederic Niemeyer | 5-7, 7-5, 6-4 | | match details | ||
| 11.03.08 | q 1 | Kei Nishikori | Alex Bogdanovic | 6-4, 4-6, 7-5 | | match details | ||
| 17.02.08 | fin | Kei Nishikori | James Blake | 3-6, 6-1, 6-4 | | match details | Delray Beach | Hard |
| 16.02.08 | 1/2 | Kei Nishikori | Sam Querrey | 4-6, 6-2, 7-67 | | match details | ||
| 15.02.08 | 1/4 | Kei Nishikori | Bobby Reynolds | 6-2, 6-4 | | match details | ||
| 14.02.08 | 2nd round | Kei Nishikori | Amer Delic | 6-77, 6-4, 6-2 | | match details | ||
| 13.02.08 | 1st round | Kei Nishikori | Florian Mayer | 6-0, 4-3, Florian Mayer - retired | | match details | ||
| 11.02.08 | qual. | Kei Nishikori | Alex Jr. Bogomolov | 6-2, 7-5 | | match details | ||
| 11.02.08 | q 2 | Kei Nishikori | Jesse Witten | 6-4, 6-4 | | match details | ||
| 10.02.08 | q 1 | Kei Nishikori | Nicolas Todero | 6-2, 6-3 | | match details | ||
| 30.10.07 | 1st round | Florent Serra | Kei Nishikori | 6-3, 7-5 | | match details |  Busan | Hard |
| 29.10.07 | qual. | Kei Nishikori | Johan Brunstrom | 6-4, 4-6, 6-3 | | match details | ||
| 29.10.07 | q 1 | Kei Nishikori | Cheong-Eui Kim | 6-4, 6-3 | | match details | ||
| 29.10.07 | q 2 | Kei Nishikori | Mustafa Ghouse | 6-3, 6-1 | | match details | ||
| 24.10.07 | 2nd round | Daniel Koellerer | Kei Nishikori | 6-2, 6-0 | | match details | Seoul | Hard |
| 23.10.07 | 1st round | Kei Nishikori | Rik de Voest | 3-6, 7-63, 6-0 | | match details | ||
| 22.10.07 | qual. | Martin Klizan | Kei Nishikori | 4-6, 7-63, 6-4 | | match details | ||
| 22.10.07 | q 2 | Kei Nishikori | Hyung-Tae Kwon | 6-1, 6-0 | | match details | ||
| 01.10.07 | 1st round | Zack Fleishman | Kei Nishikori | 7-65, 3-6, 6-1 | | match details | Tokyo | Hard |
| 11.09.07 | 1st round | Ivan Ljubicic | Kei Nishikori | 6-3, 6-4 | | match details | Beijing | Hard |
| 10.09.07 | qual. | Kei Nishikori | Sanchai Ratiwatana | 6-2, 6-4 | | match details | ||
| 09.09.07 | q 2 | Kei Nishikori | Yu Jr. Wang | 7-5, 6-3 | | match details | ||
| 08.09.07 | q 1 | Kei Nishikori | Ashley Fisher | 6-3, 6-3 | | match details | ||
| 24.08.07 | q 2 | Bjorn Phau | Kei Nishikori | 6-2, 6-4 | | match details | New York | Hard |
| 23.08.07 | q 1 | Kei Nishikori | Prakash Amritraj | 3-6, 6-1, 6-4 | | match details | ||
| 04.08.07 | q 1 | Teimuraz Gabashvili | Kei Nishikori | 6-4, 6-2 | | match details | Montreal | Hard |
| 01.08.07 | 2nd round | Julien Benneteau | Kei Nishikori | 6-2, 6-3 | | match details | Washington | Hard |
| 31.07.07 | 1st round | Kei Nishikori | Teimuraz Gabashvili | 7-64, 6-3 | | match details | ||
| 28.07.07 | 1/4 | Dmitry Tursunov | Kei Nishikori | 6-1, 6-4 | | match details | Indianapolis | Hard |
| 26.07.07 | 2nd round | Kei Nishikori | Michael Berrer | 6-3, 3-6, 6-1 | | match details | ||
| 24.07.07 | 1st round | Kei Nishikori | Alejandro Falla | 6-4, 6-3 | | match details | ||
| 23.07.07 | qual. | Kei Nishikori | Andre Sa | 7-5, 6-3 | | match details | ||
| 21.07.07 | q 2 | Kei Nishikori | Marcelo Melo | 7-65, 6-3 | | match details | ||
| 17.07.07 | 1st round | Wesley Moodie | Kei Nishikori | 6-3, 6-2 | | match details | Los Angeles | Hard |
| 16.07.07 | qual. | Kei Nishikori | James Auckland | 6-0, 6-2 | | match details | ||
| 15.07.07 | q 2 | Kei Nishikori | Ryan Thacher | 6-1, 6-4 | | match details | ||
| 14.07.07 | q 1 | Kei Nishikori | Jason Zimmermann | 6-4, 6-3 | | match details | ||
| 02.07.07 | 1st round | Noam Okun | Kei Nishikori | 6-4, 3-6, 6-2 | | match details | Winnetka | Hard |
| 06.06.07 | 1st round | Bobby Reynolds | Kei Nishikori | 4-6, 6-2, 6-3 | | match details | Yuba City | Hard |
| 03.06.07 | fin | Alex Jr. Bogomolov | Kei Nishikori | 6-4, 6-3 | | match details | Carson | Hard |
| 02.06.07 | 1/2 | Kei Nishikori | Sam Warburg | 6-4, 6-2 | | match details | ||
| 01.06.07 | 2nd round | Kei Nishikori | Michael McClune | 6-1, 6-4 | | match details | ||
| 01.06.07 | 1/4 | Kei Nishikori | Ryan Sweeting | 2-6, 7-613, 6-4 | | match details | ||
| 30.05.07 | 1st round | Kei Nishikori | Rajeev Ram | 6-2, 6-3 | | match details | ||
| 28.05.07 | q 1 | Kei Nishikori | Scott Doerner | 6-1, 6-1 | | match details | ||
| 28.05.07 | q 2 | Kei Nishikori | Nikita Kryvonos | 6-2, 6-4 | | match details | ||
| 28.05.07 | qual. | Kei Nishikori | Luka Gregorc | 6-3, Luka Gregorc - retired | | match details | ||
| 16.04.07 | 1/2 | Kei Nishikori | Brian Wilson | 6-1, 3-6, 6-2 | | match details | USA F8 | Hard |
| 16.04.07 | 1st round | Kei Nishikori | Alberto Francis | 7-66, 6-3 | | match details | ||
| 16.04.07 | 2nd round | Kei Nishikori | Sam Warburg | 6-4, 4-0, Sam Warburg - retired | | match details | ||
| 16.04.07 | fin | Donald Young | Kei Nishikori | 6-2, 6-2 | | match details | ||
| 16.04.07 | 1/4 | Kei Nishikori | Wesley Whitehouse | 6-2, 1-6, 6-3 | | match details | ||
| 12.03.07 | q 2 | Kristof Vliegen | Kei Nishikori | 6-2, 6-4 | | match details | Sunrise | Hard |
| 12.03.07 | q 1 | Kei Nishikori | Victor Estrella | 6-4, 6-0 | | match details | ||
| 05.03.07 | 1st round | Ivan Miranda | Kei Nishikori | 6-4, 6-4 | | match details | USA F6 | Hard |
| 27.11.06 | 1st round | Chris Lam | Kei Nishikori | 6-1, 6-2 | | match details | Maui | Hard |
| 27.11.06 | q 2 | Kei Nishikori | Eric Hechtman | 6-1, 6-1 | | match details | ||
| 27.11.06 | qual. | Rodrigo-Antonio Grilli | Kei Nishikori | 6-2, 6-3 | | match details | ||
| 23.10.06 | 2nd round | Kei Nishikori | Marco Pedrini | 6-2, 6-4 | | match details | Mexico F19 | Hard |
| 23.10.06 | 1/4 | Robert Godlewski | Kei Nishikori | 6-3, 6-3 | | match details | ||
| 23.10.06 | 1st round | Kei Nishikori | Shane La Porte | 6-2, 1-1, Shane La Porte - retired | | match details | ||
| 16.10.06 | 1/2 | Kei Nishikori | Robert Godlewski | 6-1, 6-4 | | match details | Mexico F18 | Hard |
| 16.10.06 | 1st round | Kei Nishikori | Marco-Aurelio Sanchez | 6-2, 6-0 | | match details | ||
| 16.10.06 | fin | Kei Nishikori | Miguel Gallardo-Valles | 6-2, 6-1 | | match details | ||
| 16.10.06 | 2nd round | Kei Nishikori | Roman Borvanov | 6-2, 7-5 | | match details | ||
| 16.10.06 | 1/4 | Kei Nishikori | John-Paul Fruttero | 6-75, 6-3, 6-3 | | match details | ||
| 02.10.06 | 2nd round | Brian Wilson | Kei Nishikori | 6-3, 4-6, 7-5 | | match details | USA F25 | Hard |
| 02.10.06 | 1st round | Kei Nishikori | Adam Kennedy | 7-64, 6-3 | | match details | ||
| 25.09.06 | 1st round | Kei Nishikori | Raphael Durek | 2-6, 6-2, 6-4 | | match details | USA F24 | Hard |
| 25.09.06 | 1/2 | Ryler Deheart | Kei Nishikori | 7-5, 7-5 | | match details | ||
| 25.09.06 | 2nd round | Kei Nishikori | Sascha Kloer | 7-5, 7-5 | | match details | ||
| 25.09.06 | 1/4 | Kei Nishikori | Robert Yim | 4-0, Robert Yim - retired | | match details | ||
| 04.09.06 | 1st round | Daniel-Alejandro Lopez | Kei Nishikori | 6-3, 6-2 | | match details | U.S. Open | Hard |
| 13.03.06 | 1st round | Kei Nishikori | Daniel Garza | 6-4, 3-6, 6-2 | | match details | Mexico F4 | Hard |
| 13.03.06 | 2nd round | Kei Nishikori | Fabrice Martin | 4-6, 6-3, 6-3 | | match details | ||
| 13.03.06 | 1/2 | Miguel Gallardo-Valles | Kei Nishikori | 7-64, Kei Nishikori - retired | | match details | ||
| 13.03.06 | 1/4 | Kei Nishikori | Bruno Echagaray | 7-63, 4-6, 6-4 | | match details | ||
| 27.01.06 | 1/4 | Alexandre Sidorenko | Kei Nishikori | 4-6, 6-3, 6-2 | | match details | Australian Open | Hard |
| 25.01.06 | 3rd round | Kei Nishikori | Dusan Lojda | 6-2, 6-4 | | match details | ||
| 24.01.06 | 2nd round | Kei Nishikori | Tim Goransson | 6-1, 6-3 | | match details | ||
| 23.01.06 | 1st round | Kei Nishikori | Paul-Mihai Puscasu | 6-1, 6-0 | | match details | ||
| 08.09.05 | 3rd round | Jeremy Chardy | Kei Nishikori | 7-5, 6-1 | | match details | U.S. Open | Hard |
| 06.09.05 | 2nd round | Kei Nishikori | Timothy Neilly | 6-4, 6-0 | | match details | ||
| 04.09.05 | 1st round | Kei Nishikori | Pavol Cervenak | 6-2, 6-3 | | match details |
