Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/04/03 11:10 | Dauud Cheaib v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/03/13 08:50 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/03/06 14:10 | Dauud Cheaib v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/02/27 12:50 | Sven Happek v Dauud Cheaib | L | 1-3 |
| Challenger Series TT | 2023/01/09 12:10 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2022/12/19 11:30 | Dauud Cheaib v Sven Happek | L | 3-1 |
| Challenger Series TT | 2022/12/15 20:50 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2022/12/05 10:50 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/04/17 17:10 | Sven Happek v Makoto Nogami | L | 1-3 |
| Challenger Series TT | 2023/04/17 14:30 | Damian Zech v Sven Happek | W | 0-3 |
| Challenger Series TT | 2023/04/17 11:50 | Michael Engelhardt v Sven Happek | W | 0-3 |
| 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 |
| Challenger Series TT | 2023/04/17 17:50 | Michael Engelhardt v Dauud Cheaib | W | 1-3 |
| Challenger Series TT | 2023/04/17 15:50 | Dauud Cheaib v Dillon Chambers | W | 3-0 |
| Challenger Series TT | 2023/04/17 13:10 | Dauud Cheaib v Siddharta Almeida | W | 3-0 |
| Challenger Series TT | 2023/04/17 11:10 | Dauud Cheaib v Makoto Nogami | W | 3-2 |
| Challenger Series TT | 2023/04/17 08:30 | Simon Berglund v Dauud Cheaib | L | 3-1 |
| Challenger Series TT | 2023/04/11 13:30 | Florian Bluhm v Dauud Cheaib | W | 1-3 |
| Challenger Series TT | 2023/04/11 12:05 | Dauud Cheaib v Peter Hribar | W | 3-0 |
| Challenger Series TT | 2023/04/11 09:50 | Alvaro Gainza v Dauud Cheaib | W | 0-3 |