25.11.19 | 1st round | Jan Zielinski/Kacper Zuk | Luis Diego Chavez Villalpando/Miguel Damas | 6-0, 7-5 | | match details | M15 Telde | Clay |
25.11.19 | 1/2 | Jose Joaquin Miranda Cisneros/David Vega Hernandez | Jan Zielinski/Kacper Zuk | 6-3, 1-0, Jan Zielinski/Kacper Zuk - retired | | match details |
25.11.19 | 1/4 | Jan Zielinski/Kacper Zuk | Joan B Borras Isern/Alvaro Saez-Royuela Ariza | 6-2, 6-2 | | match details |
28.10.19 | 1/4 | Jan Zielinski/Kacper Zuk | Julian Cash/Piotr Matuszewski | 6-1, 6-2 | | match details | M15 Sharm | Hard |
28.10.19 | 1/2 | Jan Zielinski/Kacper Zuk | Aryan Goveas/Courtney John Lock | 6-1, 6-2 | | match details |
28.10.19 | fin | Jan Zielinski/Kacper Zuk | Pablo Vivero Gonzalez/Ching-Mou Yu | 6-3, 6-1 | | match details |
28.10.19 | 1st round | Jan Zielinski/Kacper Zuk | Hanyi Liu/Chukang Wang | 6-4, 6-1 | | match details |
23.09.19 | 1st round | Jan Zielinski/Kacper Zuk | Piotr Matuszewski/Naoki Tajima | 6-2, 6-4 | | match details | M25 Stockholm | I. hard |
23.09.19 | fin | Filip Bergevi/Florian Lakat | Jan Zielinski/Kacper Zuk | 6-3, 7-63 | | match details |
23.09.19 | 1/4 | Jan Zielinski/Kacper Zuk | Antoine Bellier/Glenn Smits | 6-4, 6-1 | | match details |
23.09.19 | 1/2 | Jan Zielinski/Kacper Zuk | Janis Podzus/Martins Podzus | 6-4, 7-64 | | match details |
16.09.19 | 1/4 | Jan Zielinski/Kacper Zuk | Sarp Agabigun/Mert Alkaya | 6-1, 6-2 | | match details | M15 Antalya | Clay |
16.09.19 | 1/2 | Jan Zielinski/Kacper Zuk | Luca Gelhardt/Kai Wehnelt | 6-4, 6-2 | | match details |
16.09.19 | fin | Jan Zielinski/Kacper Zuk | Adil Kalyanpur/Kelsey Stevenson | 3-6, 6-1, 10-8 | | match details |
16.09.19 | 1st round | Jan Zielinski/Kacper Zuk | Tomas Liska/Samuel Puskar | 6-2, 6-1 | | match details |
12.09.19 | 1/4 | Matwe Middelkoop/Hans Podlipnik-Castillo | Jan Zielinski/Kacper Zuk | 6-4, 7-5 | | match details | Szczecin Challenger | Clay |
11.09.19 | 1st round | Jan Zielinski/Kacper Zuk | Ivan Gakhov/Vit Kopriva | 7-68, 6-2 | | match details |
12.08.19 | 1st round | Jan Zielinski/Kacper Zuk | Aron Stajszczak/Mikolaj Szmyrgala | 6-2, 6-2 | | match details | M25+H Bydgoszcz | Clay |
12.08.19 | 1/4 | Vladyslav Manafov/David Pichler | Jan Zielinski/Kacper Zuk | 6-3, 3-6, 10-8 | | match details |
30.07.19 | 1st round | Tomislav Brkic/Ante Pavic | Jan Zielinski/Kacper Zuk | 4-6, 6-1, 10-8 | | match details | Sopot Challenger | Clay |
23.07.19 | 1st round | Tomislav Draganja/Nikola Milojevic | Jan Zielinski/Kacper Zuk | 3-6, 6-3, 10-7 | | match details | Prague Challenger | Clay |
01.07.19 | 1/4 | Jan Zielinski/Kacper Zuk | Michal Mikula/Yann Wojcik | 6-2, 6-3 | | match details | M15 Wroclaw | Clay |
01.07.19 | 1/2 | Jan Zielinski/Kacper Zuk | Petr Nouza/Michael Vrbensky | 7-63, 6-3 | | match details |
01.07.19 | fin | Jan Zielinski/Kacper Zuk | Jan Galka/Piotr Galus | 6-4, 6-3 | | match details |
01.07.19 | 1st round | Jan Zielinski/Kacper Zuk | David Poljak/Robin Stanek | 6-4, 5-7, 10-2 | | match details |