| Challenger Series TT | 2023/02/09 18:10 | Andrei Putuntica v Dennis Klein | W | 2-3 |
| Challenger Ochsenhausen | 2021/11/16 08:00 | Andrei Putuntica v Dennis Klein | L | 3-0 |
| Challenger Ochsenhausen | 2021/08/31 14:40 | Dennis Klein v Andrei Putuntica | W | 3-2 |
| Challenger Ochsenhausen | 2021/08/30 11:50 | Dennis Klein v Andrei Putuntica | W | 3-0 |
| Challenger Ochsenhausen | 2021/07/15 11:10 | Andrei Putuntica v Dennis Klein | L | 3-0 |
| Challenger Series TT | 2023/02/10 12:25 | Dennis Klein v Sourav Saha | W | 3-1 |
| Challenger Series TT | 2023/02/10 09:30 | Bohdan Sinkevych v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2023/02/10 08:10 | Bastien Dupont v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/02/09 18:10 | Andrei Putuntica v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/02/09 16:10 | Alberto Mino v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2023/02/09 13:30 | Marco Stefanidis v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2023/02/09 12:10 | Sourav Saha v Dennis Klein | L | 3-2 |
| Challenger Series TT | 2023/02/09 07:30 | Makoto Nogami v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/02/10 13:05 | Andrei Putuntica v Alberto Mino | W | 3-1 |
| Challenger Series TT | 2023/02/10 10:10 | Andrei Putuntica v Bastien Dupont | W | 3-0 |
| Challenger Series TT | 2023/02/09 20:50 | Andrei Putuntica v Sourav Saha | W | 3-1 |
| Challenger Series TT | 2023/02/09 18:10 | Andrei Putuntica v Dennis Klein | L | 2-3 |
| Challenger Series TT | 2023/02/09 15:30 | Marco Stefanidis v Andrei Putuntica | W | 0-3 |
| Challenger Series TT | 2023/02/09 12:50 | Makoto Nogami v Andrei Putuntica | L | 3-2 |
| Challenger Series TT | 2023/02/09 10:50 | Andrei Putuntica v Bohdan Sinkevych | W | 3-0 |
| Challenger Series TT | 2023/02/09 08:50 | Andrei Putuntica v Alberto Mino | W | 3-2 |