Stadium: Sostmeier Round: 25 Ground: Clay
| ITF - M15 Caslano | 2023/08/22 09:25 | Niklas Waldner v Carlo Alberto Fossati | 1-6,6-4,6-7 |
| ITF M15 - Kottingbrunn | 2023/08/13 08:00 | Niklas Waldner v Marcell Bartakovics | 1-6,2-6 |
| ITF M25 - Bolzano | 2023/07/31 08:50 | Niklas Waldner v Noah Perfetti | 0-6,6-3,2-10 |
| ITF M25 - Bolzano | 2023/07/30 12:30 | Niklas Waldner v Serafin Zund | 6-2,2-6,10-4 |
| ITF - M25 Kramsach | 2023/07/26 12:20 | Niklas Waldner v Buvaysar Gadamauri | 2-6,7-6,4-6 |
| ITF M25 - Telfs | 2023/07/19 09:55 | Alex Barrena v Niklas Waldner | 6-4,6-4 |
| Challenger - Salzburg | 2023/07/09 08:30 | Niklas Waldner v Mohamed Safwat | 3-6,5-7 |
| ITF M25 - Klosters | 2023/07/06 08:40 | Niklas Waldner v Damien Wenger | 1-6,2-6 |
| ITF M15 - Hoei | 2023/08/24 09:00 | Jarno Jans v Marc Majdandzic | 7-5,6-2 |
| ITF M15 - Hoei | 2023/08/23 09:00 | Jim Hendrikx v Marc Majdandzic | 5-7,5-7 |
| ITF - M15 Targu Jiu | 2023/08/16 07:00 | Marc Majdandzic v Simon A Ivanov | 1-6,2-6 |
| ITF - M15 Eupen | 2023/08/13 13:00 | Marlon Vankan v Marc Majdandzic | 7-5,7-6 |
| ITF - M15 Eupen | 2023/08/12 12:15 | Peter Heller v Marc Majdandzic | 5-7,1-6 |
| ITF - M15 Eupen | 2023/08/11 16:30 | Luca Wiedenmann v Marc Majdandzic | 4-6,7-5,3-6 |
| ITF - M15 Eupen | 2023/08/10 17:00 | Pierre Yves Bailly v Marc Majdandzic | 6-3,4-6,1-6 |
| ITF - M15 Eupen | 2023/08/09 12:20 | Marc Majdandzic v Jose Pereira | 4-6,6-1,7-6 |