13.11.18 | 1st round | Arjun Kadhe/Saketh-Sai Myneni | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-3, 3-6, 11-9 |  | match details | Bangalore Challenger | Hard |
22.09.18 | 1/2 | Cheng-Peng Hsieh/Tsung-Hua Yang | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-3, 6-4 |  | match details | Kaohsiung Challenger | I. hard |
21.09.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Tomislav Brkic/Jurij Rodionov | 6-4, 7-5 |  | match details |
19.09.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Alex Lawson/Zhe Li | 6-4, 7-5 |  | match details |
15.09.18 | | Sanchai Ratiwatana/Sonchat Ratiwatana | Jad Ballout/Giovani Samaha | 6-0, 6-3 |  | match details | Davis Cup | Hard |
05.09.18 | 1st round | Hsien-Yin Peng/Tsung-Hua Yang | Sanchai Ratiwatana/Sonchat Ratiwatana | 7-61, 7-65 |  | match details | Zhangjiagang Challenger | Hard |
10.08.18 | 1/2 | Cheng-Peng Hsieh/Tsung-Hua Yang | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-1, 6-0 |  | match details | Jinan Challenger | Hard |
09.08.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Ti Chen/Matej Sabanov | 6-2, 6-3 |  | match details |
08.08.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Yuquan Jin/Zekai Li | 6-2, 6-2 |  | match details |
03.08.18 | 1/2 | Mao-Xin Gong/Ze Zhang | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-0, 6-4 |  | match details | Chengdu Challenger | Hard |
02.08.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Pedja Krstin/Danilo Petrovic | 6-4, 6-4 |  | match details |
01.08.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Benjamin Lock/Toshihide Matsui | 6-4, 6-4 |  | match details |
16.07.18 | 1/2 | Ching-Mou Yu/Michael Zhu | Sanchai Ratiwatana/Sonchat Ratiwatana | 0-6, 7-65, 11-9 |  | match details | Chinese Taipei | Hard |
16.07.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | David Barclay/Tomohiro Masabayashi | 6-1, 6-1 |  | match details |
16.07.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Chun-Chi Han/Chu-Huan Yi | 7-66, 6-3 |  | match details |
26.06.18 | q 1 | Sander Gille/Joran Vliegen | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-4, 6-4 |  | match details | Wimbledon | Grass |
19.06.18 | 1st round | Liam Broady/Scott Clayton | Sanchai Ratiwatana/Sonchat Ratiwatana | 7-66, 6-4 |  | match details | Ilkley Challenger | Grass |
13.06.18 | 1st round | Marton Fucsovics/Mischa Zverev | Sanchai Ratiwatana/Sonchat Ratiwatana | 7-5, 3-6, 10-7 |  | match details | Stuttgart | Grass |
19.05.18 | 1/2 | Ruan Roelofse/John-Patrick Smith | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-4, 6-4 |  | match details | Busan Challenger | Hard |
18.05.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Ruben Gonzales/Brayden Schnur | 6-2, 6-4 |  | match details |
15.05.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Toshihide Matsui/Jose Statham | 6-1, 6-2 |  | match details |
12.05.18 | fin | Ruan Roelofse/John-Patrick Smith | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-2, 6-3 |  | match details | Gimcheon Challenger | Hard |
11.05.18 | 1/2 | Sanchai Ratiwatana/Sonchat Ratiwatana | Alexander Bury/Hsien-Yin Peng | 3-6, 6-3, 10-4 |  | match details |
10.05.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Max Purcell/Luke Saville | 6-1, 6-4 |  | match details |
09.05.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Ti Chen/Chu-Huan Yi | 6-1, 4-6, 10-8 |  | match details |
03.05.18 | 1st round | Ti Chen/Chu-Huan Yi | Sanchai Ratiwatana/Sonchat Ratiwatana | 7-66, 4-6, 10-8 |  | match details | Seoul Challenger | Hard |
13.04.18 | 1/2 | Matthew Ebden/Andrew Whittington | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-3, 6-4 |  | match details | Taipei City | Carpet |
12.04.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Jonathan Erlich/Frederik Nielsen | 6-0, 3-6, 10-6 |  | match details |
11.04.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Tatsuma Ito/Toshihide Matsui | 6-72, 6-3, 10-6 |  | match details |
08.04.18 | | Sanchai Ratiwatana/Sonchat Ratiwatana | Francis Casey Alcantara/Johnny Arcilla | 4-6, 7-63, 6-1 |  | match details | Davis Cup | Clay |
30.03.18 | 1/2 | Sander Arends/Tristan-Samuel Weissborn | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-4, 6-3 |  | match details | St. Brieuc | I. hard |
29.03.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Mohamed Safwat/Jurgen Zopp | 6-1, 6-1 |  | match details |
28.03.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Jeevan Nedunchezhiyan/Purav Raja | 7-65, 3-6, 10-8 |  | match details |
19.03.18 | 1st round | Roman Jebavy/Antonio Sancic | Sanchai Ratiwatana/Sonchat Ratiwatana | 7-66, 6-4 |  | match details | Lille Challenger | I. hard |
02.03.18 | fin | Tobias Kamke/Tim Puetz | Sanchai Ratiwatana/Sonchat Ratiwatana | 3-6, 7-5, 12-10 |  | match details | Yokohama Challenger | Hard |
01.03.18 | 1/2 | Sanchai Ratiwatana/Sonchat Ratiwatana | Tatsuma Ito/Kaito Uesugi | 5-7, 6-2, 10-6 |  | match details |
27.02.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Max Purcell/Andrew Whittington | 6-3, 7-5 |  | match details |
25.02.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Shinji Hazawa/Masamichi Imamura | 6-3, 6-4 |  | match details |
20.02.18 | 1st round | Mao-Xin Gong/Cheng-Peng Hsieh | Sanchai Ratiwatana/Sonchat Ratiwatana | 7-66, 6-4 |  | match details | Kyoto Challenger | Carpet |
15.02.18 | 1/2 | Cem Ilkel/Danilo Petrovic | Sanchai Ratiwatana/Sonchat Ratiwatana | 7-65, 2-6, 10-8 |  | match details | Chennai Challenger | Hard |
14.02.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Kunal Anand/Anvit Bendre | 6-0, 6-2 |  | match details |
12.02.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Chandril Sood/Lakshit Sood | 6-0, 6-3 |  | match details |
17.01.18 | 1st round | Pablo Andujar/Albert Ramos-Vinolas | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-4, 6-4 |  | match details | Melbourne | Hard |
11.01.18 | 1/4 | Cheng-Peng Hsieh/Tsung-Hua Yang | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-4, 7-66 |  | match details | Bangkok Challenger | Hard |
10.01.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Frederik Nielsen/David O'hare | 6-3, 6-4 |  | match details |
05.01.18 | 1/2 | Gerard Granollers/Marcel Granollers | Sanchai Ratiwatana/Sonchat Ratiwatana | 6-3, 6-4 |  | match details | Bangkok Challenger | Hard |
04.01.18 | 1/4 | Sanchai Ratiwatana/Sonchat Ratiwatana | Mikhail Elgin/Timur Khabibulin | 6-4, 3-6, 10-4 |  | match details |
03.01.18 | 1st round | Sanchai Ratiwatana/Sonchat Ratiwatana | Ivan Sabanov/Matej Sabanov | 7-62, 6-3 |  | match details |