Stadium: Court 10 Round: 25 Ground: Clay
| ITF M15 Warmbad-Villach | 2021/08/17 08:00 | Petr Hajek v Ioannis Xilas | 6-3,7-6 |
| ITF M15 Warmbad-Villach | 2021/08/16 12:30 | Petr Hajek v Daniele Valentino | 6-3,6-1 |
| ITF M15 Gdynia | 2021/08/12 08:00 | Filip Peliwo v Petr Hajek | 6-1,6-3 |
| ITF M15 Gdynia | 2021/08/11 12:30 | Petr Hajek v Maks Kasnikowski | 6-4,6-7,7-5 |
| ITF M15 Gdynia | 2021/08/10 08:00 | Petr Hajek v Filip Pieczonka | 5-7,4-6 |
| ITF M15 Gdynia | 2021/08/09 10:30 | Petr Hajek v Simonas Zukauskas | 6-0,6-1 |
| ITF M15 Heraklion | 2021/06/06 07:30 | Petr Hajek v Ioannis Papounidis | 4-6,7-5,6-10 |
| ITF M15 Heraklion | 2021/05/31 06:30 | Petr Hajek v Toby D. Boyer | 4-6,7-6,6-10 |
| ITF M25 Velenje | 2021/07/07 08:00 | Tom Kocevar-Desman v Matias Zukas | 5-7,0-6 |
| ITF M15 Sibenik | 2021/05/21 10:45 | Tom Kocevar-Desman v Rimpei Kawakami | 4-6,1-6 |
| ITF M15 Sibenik | 2021/05/20 11:00 | Nikita Mashtakov v Tom Kocevar-Desman | 5-7,4-6 |
| ITF M15 Sibenik | 2021/05/19 14:25 | Tom Kocevar-Desman v Jaimee Floyd Angele | 6-3,7-6 |
| ITF M15 Troisdorf | 2021/05/14 12:35 | Tom Kocevar-Desman v Timo Stodder | 6-2,3-6,5-7 |
| ITF M15 Troisdorf | 2021/05/13 09:00 | Dan Added v Tom Kocevar-Desman | 6-7,6-7 |
| ITF M15 Troisdorf | 2021/05/12 09:00 | Constantin Schmitz v Tom Kocevar-Desman | 6-4,4-6,3-6 |
| ITF M15 Troisdorf | 2021/05/11 08:00 | Tom Kocevar-Desman v Yannik Steinegger | 6-3,6-1 |