| Challenger Series TT | 2023/06/19 11:50 | Dennis Klein v Marco Stefanidis | L | 3-0 |
| Challenger Series TT | 2023/02/09 13:30 | Marco Stefanidis v Dennis Klein | L | 1-3 |
| Challenger Series TT | 2023/06/20 09:10 | Marco Stefanidis v Aljaz Godec | W | 3-2 |
| Challenger Series TT | 2023/06/19 19:50 | Marco Stefanidis v Akito Itagaki | L | 1-3 |
| Challenger Series TT | 2023/06/19 17:10 | Marco Stefanidis v Johannes Willeke | W | 3-0 |
| Challenger Series TT | 2023/06/19 14:30 | Sven Happek v Marco Stefanidis | L | 3-1 |
| Challenger Series TT | 2023/06/19 11:50 | Dennis Klein v Marco Stefanidis | L | 3-0 |
| Challenger Series TT | 2023/06/19 09:50 | Marco Stefanidis v Jose Guillot | L | 1-3 |
| Challenger Series TT | 2023/06/19 07:50 | Marco Stefanidis v Carlo Rossi | L | 1-3 |
| Challenger Series TT | 2023/06/09 08:30 | Kirill Fadeev v Marco Stefanidis | L | 3-0 |
| Challenger Series TT | 2023/06/23 13:30 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger Series TT | 2023/06/23 11:25 | Dennis Klein v Ihor Zavadskyi | W | 3-0 |
| Challenger Series TT | 2023/06/23 10:30 | Dennis Klein v Ihor Zavadskyi | W | 3-2 |
| Challenger Series TT | 2023/06/23 07:50 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger Series TT | 2023/06/22 19:10 | Dennis Klein v Carlo Rossi | W | 3-1 |
| Challenger Series TT | 2023/06/22 14:30 | Dennis Klein v Sven Happek | W | 3-0 |
| Challenger Series TT | 2023/06/22 12:30 | Dennis Klein v Johannes Willeke | W | 3-0 |
| Challenger Series TT | 2023/06/22 09:10 | Tobias Slanina v Dennis Klein | W | 2-3 |