Stadium: Court 1 Round: 54 Ground: Clay
| ITF M25 Sion | 2023/08/27 14:15 | Batiste Guerra v Thomas Mathys | 1-6,2-6 |
| ITF M15 Caslano | 2023/08/20 14:50 | Lorenzo Vatteroni v Thomas Mathys | 6-0,6-1 |
| ITF M25 Muttenz | 2023/08/14 14:00 | Jonas Schaer v Thomas Mathys | 6-3,5-7,10-4 |
| ITF M15 Xativa | 2023/07/30 07:00 | Thomas Mathys v Sam K Baumgartner | 3-6,1-6 |
| ITF M25 Porto | 2023/07/25 11:40 | Jake Van Emburgh v Thomas Mathys | 6-0,6-4 |
| ITF M25 Porto | 2023/07/24 13:30 | Thomas Mathys v Rodrigo Beires | 6-1,6-1 |
| ITF M25 Porto | 2023/07/23 12:00 | Tomas Almeida v Thomas Mathys | 5-7,4-6 |
| ITF M25 Klosters | 2023/07/02 12:35 | Thomas Mathys v Raffael Schaer | 3-6,4-6 |
| ITF M25 Sion | 2023/08/27 12:35 | Francesco Schmitz v Stepan Pecak | 4-6,2-6 |
| ITF M15 Caslano | 2023/08/20 14:40 | Davide Ferrarolli v Stepan Pecak | 6-2,6-4 |
| ITF M25 Kramsach | 2023/07/24 09:00 | Manuel Plunger v Stepan Pecak | 6-1,6-2 |
| ITF M25 Kramsach | 2023/07/23 12:00 | Nico Jaeger v Stepan Pecak | 0-6,6-7 |
| ITF M25 Kramsach | 2023/07/23 07:00 | Gabriel Moroder v Stepan Pecak | 1-6,1-6 |
| ITF M25 Telfs | 2023/07/17 07:00 | Adam Blecha v Stepan Pecak | 6-3,6-1 |
| ITF M25 Telfs | 2023/07/16 07:00 | Stepan Pecak v Martin Zeljenka | 6-4,1-6,10-2 |
| ITF M15 Kamen | 2023/06/26 15:00 | Stepan Pecak v Matyas Cerny | 5-7,3-6 |