Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Bad Waltersdorf | 2023/10/02 08:00 | Jan Kupcic v Josip Simundza | 6-3,6-2 |
| ITF M15 Bad Waltersdorf | 2023/10/01 09:00 | Jan Kupcic v Artem Podorozhnyi | 4-6,6-2,10-5 |
| ITF M15 Arad | 2023/09/26 11:55 | Kai Wehnelt v Jan Kupcic | 3-6,7-6,6-4 |
| ITF M15 Arad | 2023/09/25 07:00 | Jan Kupcic v Samuil Konov | 7-6,4-6,10-6 |
| ITF M25 Maribor | 2023/09/06 09:50 | Jan Kupcic v Mathys Erhard | 6-4,1-6,4-6 |
| ITF M25 Maribor | 2023/08/31 08:50 | Jan Kupcic v Mirza Basic | 4-6,6-7 |
| ITF M15 Kottingbrunn | 2023/08/13 12:00 | Jan Kupcic v Dennis Dragomirov | 4-6,6-7 |
| ITF M25 Osijek | 2023/08/09 12:25 | Jan Kupcic v Luca Giacomini | 6-2,2-6,3-6 |
| ITF M25 Sabadell | 2023/09/26 10:20 | Imanol L Morillo v Peter Heller | 7-6,2-6,6-4 |
| ITF M25 Madrid | 2023/09/17 11:00 | Aidan Mchugh v Peter Heller | 6-4,7-5 |
| ITF M25 Madrid | 2023/09/16 07:55 | Miguel Damas v Peter Heller | 6-2,6-7,5-7 |
| ITF M25 Madrid | 2023/09/15 09:00 | Peter Heller v Clement Chidekh | 6-2,6-3 |
| ITF M25 Madrid | 2023/09/14 11:45 | Peter Heller v Alberto Romero De Avila Senise | 6-2,6-1 |
| ITF M25 Madrid | 2023/09/12 11:20 | Peter Heller v Martin Landaluce | 6-7,6-4,6-4 |
| ITF M15 Vienna | 2023/09/03 08:30 | Milos Karol v Peter Heller | 6-7,2-6 |
| ITF M15 Vienna | 2023/09/02 12:35 | Gerald Melzer v Peter Heller | 6-7,5-7 |