Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/03/13 12:50 | Michael Engelhardt v Sven Happek | W | 3-1 |
| Challenger Series TT | 2022/07/11 15:50 | Michael Engelhardt v Sven Happek | L | 2-3 |
| Challenger Ochsenhausen | 2022/05/30 14:30 | Michael Engelhardt v Sven Happek | L | 2-3 |
| Challenger Ochsenhausen | 2022/01/13 10:10 | Sven Happek v Michael Engelhardt | L | 3-2 |
| Challenger Series TT | 2023/04/17 09:10 | Michael Engelhardt v Damian Zech | W | 3-0 |
| Challenger Series TT | 2023/04/17 06:30 | Michael Engelhardt v Makoto Nogami | W | 3-2 |
| Challenger Series TT | 2023/03/14 10:50 | Michael Engelhardt v Peter Hribar | L | 1-3 |
| Challenger Series TT | 2023/03/14 07:30 | Michael Engelhardt v Dauud Cheaib | L | 1-3 |
| Challenger Series TT | 2023/03/13 18:50 | Michael Engelhardt v Anton Limonov | L | 1-3 |
| Challenger Series TT | 2023/03/13 17:30 | Michael Engelhardt v Ahmed El-Mahdy | L | 1-3 |
| Challenger Series TT | 2023/03/13 12:50 | Michael Engelhardt v Sven Happek | W | 3-1 |
| Challenger Series TT | 2023/03/13 10:10 | Michael Engelhardt v Felix Kohler | W | 3-1 |
| Challenger Series TT | 2023/04/17 09:50 | Sven Happek v Dillon Chambers | L | 1-3 |
| Challenger Series TT | 2023/04/17 07:50 | Sven Happek v Siddharta Almeida | L | 2-3 |
| Challenger Series TT | 2023/04/03 12:30 | Dennis Klein v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/04/03 11:10 | Dauud Cheaib v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/04/03 06:30 | Pekka Pelz v Sven Happek | L | 3-0 |
| TT Star Series | 2023/03/25 11:15 | Henning Zeptner v Sven Happek | W | 0-3 |
| TT Star Series | 2023/03/25 08:10 | Sven Happek v Antonin Gavlas | L | 0-3 |
| TT Star Series | 2023/03/24 14:15 | Sven Happek v Michal Obeslo | L | 0-3 |