Stadium: Court 12 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Budapest | 2021/09/28 07:30 | Zsombor Velcz v Attila Dominik Boros | 7-5,6-7,4-6 |
| ITF M15 Zlatibor | 2021/09/17 10:55 | Yan Bondarevskiy v Zsombor Velcz | 6-4,6-1 |
| ITF M15 Zlatibor | 2021/09/16 11:30 | Zsombor Velcz v Sebastian Gima | 6-3,6-4 |
| ITF M15 Zlatibor | 2021/09/15 09:30 | Zsombor Velcz v Savva Polukhin | 6-4,6-4 |
| ITF M15 Zilina | 2021/09/03 09:45 | Zsombor Velcz v Adria Soriano Barrera | 3-6,4-6 |
| ITF M15 Zilina | 2021/09/02 07:55 | Zsombor Velcz v Peter Nad | 7-6,6-2 |
| ITF M15 Zilina | 2021/09/01 14:45 | Mathieu Perchicot v Zsombor Velcz | 4-6,3-6 |
| ITF M15 Bratislava | 2021/08/18 08:00 | Bastian Malla v Zsombor Velcz | 6-2,6-2 |
| 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 |