Stadium: Court 1 Round: 28 Ground: Carpet indoor
| Challenger Warsaw | 2021/08/22 12:15 | Jonathan Mridha v David Poljak | 2-6,6-4,6-2 |
| ITF M25 Prostejov | 2021/08/17 09:00 | Alex Rybakov v David Poljak | 7-6,7-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/08 08:00 | David Poljak v Zsombor Piros | 4-6,6-7 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/07 11:55 | David Poljak v Adam Pavlasek | 4-6,7-6,6-1 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/07 07:25 | David Poljak v Michal Dembek | 6-3,3-6,6-3 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/04 17:10 | David Poljak v Szymon Kielan | 7-5,6-3 |
| Challenger Poznan | 2021/07/27 16:25 | Elmar Ejupovic v David Poljak | 6-2,6-4 |
| Challenger Poznan | 2021/07/26 11:35 | David Poljak v Lucas Gerch | 7-5,1-6,6-4 |
| ITF M25 Montauban | 2021/06/21 16:15 | Maxime Mora v Sean Cuenin | 4-6,6-3,13-11 |
| ITF M25 Montauban | 2021/06/21 10:45 | Arthur Bonnaud v Sean Cuenin | 4-6,6-4,5-10 |
| ITF M15 Helsinki | 2021/06/03 09:30 | Sean Cuenin v Karl Friberg | 4-6,4-6 |
| ITF M15 Helsinki | 2021/06/02 08:10 | Simon Freund v Sean Cuenin | 2-6,6-4,4-6 |
| ITF M25 Most | 2021/05/26 07:55 | Sean Cuenin v Filip Peliwo | 5-7,6-1,4-6 |
| ITF M25 Most | 2021/05/25 08:00 | Ondrej Valek v Sean Cuenin | 2-6,2-6 |
| ITF M25 Most | 2021/05/24 09:00 | Alexandre Ruscica v Sean Cuenin | 2-6,3-6 |
| ITF M15 Sibenik | 2021/05/19 10:15 | Sebastian Prechtel v Sean Cuenin | 6-3,7-5 |