Stadium: Court 3 Round: 54 Ground: Hardcourt indoor
| Challenger Prostejov | 2023/06/04 09:25 | Mate Valkusz v Jan Kumstat | 6-4,6-2 |
| Challenger Bratislava | 2022/11/06 12:10 | Hamad Medjedovic v Jan Kumstat | 6-1,6-4 |
| ITF M15 Prostejov | 2022/09/27 15:00 | Tomas Jirousek v Jan Kumstat | 6-4,6-4 |
| Challenger Prostejov | 2022/05/29 15:20 | Louis Wessels v Jan Kumstat | 6-3,6-2 |
| ITF M25 Santo Domingo | 2024/03/12 13:00 | Ricardo Rodriguez-Pace v Jan Jermar | 7-5,3-6,10-6 |
| ITF M25 Santo Domingo | 2024/03/11 14:00 | Jim A De Leon Aquino v Jan Jermar | 0-6,1-6 |
| ITF M25 Santo Domingo | 2024/03/10 17:00 | Charles Dossetter v Jan Jermar | 3-6,0-6 |
| ITF M25 Santo Domingo | 2024/03/03 14:00 | Jan Jermar v Pranav Kumar | 4-6,2-6 |
| ITF M15 Antalya | 2023/12/19 09:10 | Jan Jermar v Gabriele Thomas Brancatelli | 0-6,0-6 |
| ITF M15 Antalya | 2023/12/12 06:00 | Mert Alkaya v Jan Jermar | 6-3,6-0 |
| ITF M15 Antalya | 2023/12/10 07:00 | Jan Jermar v Vitaliy Zatsepin | 6-3,6-1 |
| ITF M15 Antalya | 2023/12/05 13:20 | Jan Jermar v Joao Eduardo Schiessl | 2-6,4-6 |