Ground: Clay
| ITF M15 Vienna | 2025/08/28 09:30 | Neil Oberleitner v Preston Brown | 7-5,6-4 |
| ITF M15 Vienna | 2025/08/26 10:00 | Neil Oberleitner v Egor Pleshivtsev | 6-2,6-2 |
| ITF M15 Mistelbach | 2025/08/22 14:48 | Marcel Zielinski v Neil Oberleitner | 6-3,6-4 |
| ITF M15 Mistelbach | 2025/08/21 12:20 | Julien Penzlin v Neil Oberleitner | 3-6,4-6 |
| ITF M15 Mistelbach | 2025/08/20 15:45 | Gabor Hornung v Neil Oberleitner | 3-6,1-6 |
| Challenger Bonn | 2025/08/03 09:00 | Neil Oberleitner v Yanaki Milev | 4-6,6-3,4-6 |
| Challenger Hagen | 2025/07/28 11:30 | Neil Oberleitner v Alexander Donski | 7-6,6-7,6-7 |
| Challenger Hagen | 2025/07/27 15:05 | Neil Oberleitner v John Sperle | 6-4,6-4 |
| ITF M15 Vienna | 2025/08/28 10:38 | Josip Simundza v Bastian Berenz | 6-1,6-3 |
| ITF M15 Vienna | 2025/08/27 08:48 | Josip Simundza v Maksym Khlyvniuk | 6-1,6-3 |
| ITF M15 Gubbio | 2025/07/17 08:30 | Andrea Meduri v Josip Simundza | 7-5,4-6,7-5 |
| ITF M15 Gubbio | 2025/07/16 09:30 | Gabriele Vulpitta v Josip Simundza | 5-7,4-6 |
| ITF M15 Store | 2025/07/02 12:47 | Josip Simundza v Francisco Rocha | 6-7,3-6 |
| ITF M15 Zagreb | 2025/06/29 08:00 | Josip Simundza v Mirza Basic | 7-6,6-7,4-6 |
| ITF M15 Zagreb | 2025/06/28 08:00 | Nikita Mashtakov v Josip Simundza | 4-6,6-3,6-7 |
| ITF M15 Zagreb | 2025/06/27 08:00 | Francisco Rocha v Josip Simundza | 6-7,6-3,3-6 |