Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/08/15 08:30 | Marcel Neumaier v Marco Stefanidis | L | 1-3 |
| Challenger Series TT | 2025/05/30 08:00 | Marcel Neumaier v Yoan Rebetez | L | 1-3 |
| Challenger Series TT | 2025/05/29 17:00 | Marcel Neumaier v Damian Zech | L | 2-3 |
| Challenger Series TT | 2025/05/29 15:00 | Marcel Neumaier v Siddharta Almeida | W | 3-1 |
| Challenger Series TT | 2025/05/29 14:00 | Marcel Neumaier v Jeromy Loffler | L | 1-3 |
| Challenger Series TT | 2025/05/29 10:30 | Marcel Neumaier v Liang Qiu | L | 0-3 |
| Challenger Series TT | 2025/05/29 08:30 | Marcel Neumaier v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2025/05/29 06:30 | Marcel Neumaier v Daniel Rinderer | L | 1-3 |
| Challenger Series TT | 2025/04/15 07:00 | Pylyp Koloidenko v Marcel Neumaier | L | 3-2 |
| Challenger Series TT | 2025/05/27 09:45 | Marco Stefanidis v Kestutis Zeimys | L | 0-3 |
| Challenger Series TT | 2025/05/27 08:45 | Viktor Yefimov v Marco Stefanidis | L | 3-1 |
| Challenger Series TT | 2025/05/27 06:30 | Olav Kosolosky v Marco Stefanidis | L | 3-0 |
| Challenger Series TT | 2025/05/26 15:30 | Bennet Robben v Marco Stefanidis | W | 1-3 |
| Challenger Series TT | 2025/05/26 13:30 | Viktor Yefimov v Marco Stefanidis | W | 1-3 |
| Challenger Series TT | 2025/05/26 12:30 | Kestutis Zeimys v Marco Stefanidis | L | 3-0 |
| Challenger Series TT | 2025/05/26 11:00 | Boris Brnovic v Marco Stefanidis | W | 2-3 |
| Challenger Series TT | 2025/05/26 06:30 | Thomas Pellny v Marco Stefanidis | W | 2-3 |