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