| Challenger Series TT | 2022/08/02 08:30 | Dennis Klein v Michael Engelhardt | W | 3-0 |
| Challenger Series TT | 2022/07/29 08:30 | Michael Engelhardt v Dennis Klein | L | 3-2 |
| Challenger Series TT | 2022/07/11 11:10 | Michael Engelhardt v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2022/06/16 06:30 | Michael Engelhardt v Dennis Klein | W | 1-3 |
| Challenger Ochsenhausen | 2021/07/28 11:50 | Michael Engelhardt v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2021/07/26 18:00 | Michael Engelhardt v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2021/06/10 07:10 | Michael Engelhardt v Dennis Klein | W | 0-3 |
| Challenger Ochsenhausen | 2021/05/10 11:50 | Dennis Klein v Michael Engelhardt | W | 3-2 |