| ITF M25 Ceska Lipa | 2025/06/12 09:30 | Jan Kumstat v Martin Krumich | 6-2,3-6,3-5 |
| ITF M25 Ceska Lipa | 2025/06/10 10:23 | Jan Kumstat v Vladyslav Orlov | 7-6,6-2 |
| ITF M15 Szentendre | 2025/05/16 09:00 | Dominik Kellovsky v Jan Kumstat | 6-3,3-6,6-1 |
| ITF M15 Szentendre | 2025/05/15 08:00 | Jan Kumstat v Attila Dominik Boros | 6-4,7-5 |
| ITF M15 Szentendre | 2025/05/14 08:00 | Bruno Fernandez v Jan Kumstat | 4-6,6-7 |
| Challenger Prague | 2025/05/06 12:45 | Jan Kumstat v Filip Misolic | 4-6,5-7 |
| Challenger Prague | 2025/05/05 10:35 | Jan Kumstat v Alex Martinez | 6-4,1-6,6-4 |
| Challenger Prague | 2025/05/04 10:30 | Henri Squire v Jan Kumstat | 7-5,6-7,1-6 |
| Challenger Sassuolo | 2025/06/16 08:00 | Alexander Weis v Stefano Napolitano | 6-4,4-6,0-6 |
| Challenger Perugia | 2025/06/09 11:30 | Gerard Campana Lee v Alexander Weis | 7-5,6-3 |
| Challenger Perugia | 2025/06/08 13:40 | Alexander Weis v Gianluca Mager | 7-5,7-6 |
| Challenger Prostejov | 2025/06/01 08:00 | Alexander Weis v Toby Alex Kodat | 5-7,0-6 |
| ITF M15 Gyula | 2025/05/30 09:00 | Alexander Weis v Leo Raquillet | 2-6,6-4,2-6 |
| ITF M15 Gyula | 2025/05/28 09:30 | Alexander Weis v Gregor Hausberger | 6-1,6-2 |
| ITF M25 Cervia | 2025/05/22 09:30 | Alexander Weis v Filippo Romano | 6-2,4-6,3-6 |
| ITF M25 Cervia | 2025/05/20 10:00 | Alexander Weis v Silvio Mencaglia | 6-1,6-3 |