Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/05/01 06:30 | Dennis Klein v Michael Engelhardt | L | 3-0 |
| Challenger Series TT | 2022/08/08 09:10 | Dennis Klein v Michael Engelhardt | L | 3-0 |
| Challenger Series TT | 2022/08/02 08:30 | Dennis Klein v Michael Engelhardt | L | 3-0 |
| Challenger Series TT | 2022/07/29 08:30 | Michael Engelhardt v Dennis Klein | W | 3-2 |
| Challenger Series TT | 2022/07/11 11:10 | Michael Engelhardt v Dennis Klein | L | 1-3 |
| 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 Series TT | 2024/02/16 10:10 | Dauud Cheaib v Michael Engelhardt | L | 3-2 |
| Challenger Series TT | 2024/02/16 08:10 | Michael Engelhardt v Norbert Tauler | L | 1-3 |
| Challenger Series TT | 2024/02/15 20:10 | Can Akkuzu v Michael Engelhardt | L | 3-1 |
| Challenger Series TT | 2024/02/15 17:30 | Albert Vilardell v Michael Engelhardt | L | 3-1 |
| Challenger Series TT | 2024/02/15 14:50 | Michael Engelhardt v Mathias Golab | L | 1-3 |
| Challenger Series TT | 2024/02/15 11:30 | Michael Engelhardt v Alberto Mino | W | 3-1 |
| Challenger Series TT | 2024/02/15 09:30 | Michael Engelhardt v Mike Hollo | L | 2-3 |
| Challenger Series TT | 2024/01/12 09:30 | Damian Zech v Michael Engelhardt | W | 2-3 |
| Challenger Series TT | 2024/04/26 12:45 | Benjamin Fruchart v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2024/04/26 11:20 | Albert Vilardell v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2024/04/26 09:25 | Bohdan Sinkevych v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2024/04/26 08:15 | Dennis Klein v Albert Vilardell | W | 3-1 |
| Challenger Series TT | 2024/04/25 17:50 | Mike Hollo v Dennis Klein | L | 3-1 |
| Challenger Series TT | 2024/04/25 15:30 | Benjamin Fruchart v Dennis Klein | L | 3-0 |
| Challenger Series TT | 2024/04/25 13:45 | Dauud Cheaib v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2024/04/25 09:25 | Damian Zech v Dennis Klein | W | 0-3 |