Stadium: Court 5 Round: 25 Ground: Hardcourt indoor
| ITF M25 Prague | 2021/10/06 15:20 | David Poljak v Leopold Zima | 6-4,6-1 |
| Challenger Sibiu | 2021/09/26 07:30 | Yan Bondarevskiy v David Poljak | 7-5,3-6,6-3 |
| Challenger Bucharest | 2021/09/19 09:45 | David Poljak v Uladzimir Ignatik | 4-6,1-6 |
| Challenger Banja Luka | 2021/09/07 08:00 | David Poljak v Tomas Martin Etcheverry | 2-6,5-7 |
| Challenger Banja Luka | 2021/09/06 11:35 | David Poljak v Mircea-Alexandru Jecan | 6-3,6-4 |
| Challenger Banja Luka | 2021/09/05 12:25 | David Poljak v Moez Echargui | 2-6,6-3,6-2 |
| 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 M15 Pirot | 2021/09/23 11:00 | Tom Kocevar-Desman v Savva Polukhin | 2-6,1-6 |
| ITF M15 Pirot | 2021/09/22 08:00 | Tom Kocevar-Desman v Aristotelis Thanos | 7-6,6-1 |
| Davis Cup | 2021/09/18 06:50 | Tom Kocevar-Desman v Adolfo Daniel Vallejo | 6-2,6-2 |
| ITF M15 Bad Waltersdorf | 2021/09/02 09:25 | Lukas Neumayer v Tom Kocevar-Desman | 7-5,6-2 |
| ITF M15 Bad Waltersdorf | 2021/08/31 10:55 | Tom Kocevar-Desman v Davide Galoppini | 6-3,6-3 |
| ITF M15 Bad Waltersdorf | 2021/08/28 09:40 | Timo Stodder v Tom Kocevar-Desman | 6-1,7-6 |
| ITF M15 Bad Waltersdorf | 2021/08/27 12:05 | Tom Kocevar-Desman v Alessandro Pecci | 7-5,6-2 |
| ITF M15 Bad Waltersdorf | 2021/08/26 07:00 | Daniele Capecchi v Tom Kocevar-Desman | 6-7,3-6 |