| ITF M15 Casablanca | 2023/06/18 14:30 | Jan Jermar v Othman Bezzaz | 7-6,5-7,7-10 |
| Challenger Ostrava | 2023/04/23 12:15 | Henri Squire v Jan Jermar | 6-2,6-4 |
| ITF M25 Faro | 2023/02/20 11:35 | Jan Jermar v Fabio Coelho | 2-6,1-6 |
| ITF M25 Faro | 2023/02/19 13:00 | Manuel Almeida v Jan Jermar | 0-6,2-6 |
| ITF M25 Vila Real de Santo Antonio | 2023/02/13 09:30 | Benjamin Winter Lopez v Jan Jermar | 6-1,6-2 |
| ITF M25 Vila Real de Santo Antonio | 2023/02/12 09:00 | Jan Jermar v Jordi Domenech Castillo | 6-2,6-3 |
| ITF M25 Vila Real de Santo Antonio | 2023/02/07 10:00 | Mario Mansilla Diez v Jan Jermar | 6-0,6-2 |
| ITF M25 Vila Real de Santo Antonio | 2023/02/06 10:00 | Jan Jermar v Enzo Frances Tessari | 6-4,6-2 |