Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2024/04/29 08:20 | Michael Engelhardt v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2023/05/01 06:30 | Dennis Klein v Michael Engelhardt | W | 3-0 |
| Challenger Series TT | 2022/08/08 09:10 | Dennis Klein v Michael Engelhardt | W | 3-0 |
| 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 Series TT | 2024/10/14 14:00 | Dennis Klein v Marius Henninger | W | 3-0 |
| Challenger Series TT | 2024/10/14 10:30 | Dennis Klein v Tom Colvin | W | 3-0 |
| Challenger Series TT | 2024/10/14 08:30 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger Series TT | 2024/10/14 06:30 | Dennis Klein v Guillaume Alcayde | W | 3-0 |
| Challenger Series TT | 2024/10/01 10:30 | Kirill Fadeev v Dennis Klein | L | 3-1 |
| Challenger Series TT | 2024/10/01 09:45 | Dennis Klein v Dimitrije Levajac | L | 0-3 |
| Challenger Series TT | 2024/10/01 08:30 | Liang Qiu v Dennis Klein | W | 1-3 |
| Challenger Series TT | 2024/09/30 17:00 | Reda Nemras v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2024/10/14 13:30 | Michael Engelhardt v Florian Bluhm | L | 0-3 |
| Challenger Series TT | 2024/10/14 11:30 | Michael Engelhardt v Jeromy Loffler | L | 0-3 |
| Challenger Series TT | 2024/10/14 10:00 | Michael Engelhardt v Guillaume Alcayde | L | 1-3 |
| Challenger Series TT | 2024/10/14 08:00 | Marius Henninger v Michael Engelhardt | W | 0-3 |
| Challenger Series TT | 2024/05/23 18:30 | Siddharta Almeida v Michael Engelhardt | W | 0-3 |
| Challenger Series TT | 2024/05/23 18:00 | Michael Engelhardt v Carlos Roman Pozo | W | 3-0 |
| Challenger Series TT | 2024/05/23 17:00 | Michael Engelhardt v William Koehl | W | 3-2 |
| Challenger Series TT | 2024/05/23 16:00 | Mykhailo Mosiuk v Michael Engelhardt | L | 3-0 |