| 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 |