Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/06/22 19:50 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/04/17 19:50 | Sven Happek v Dauud Cheaib | L | 0-3 |
| 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 | 2023/09/18 06:30 | Sven Happek v Liang Qiu | L | 2-3 |
| Challenger Series TT | 2023/06/27 09:50 | Marius Henninger v Sven Happek | L | 3-2 |
| Challenger Series TT | 2023/06/27 08:30 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Series TT | 2023/06/26 18:30 | Benjamin Fruchart v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/06/26 15:50 | Antonin Gavlas v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/06/26 13:50 | Carlo Rossi v Sven Happek | L | 3-2 |
| Challenger Series TT | 2023/06/26 09:50 | Damian Zech v Sven Happek | W | 2-3 |
| Challenger Series TT | 2023/06/26 07:10 | Makoto Nogami v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/09/18 07:10 | Dauud Cheaib v Alvaro Gainza | W | 3-0 |
| Challenger Series TT | 2023/09/14 13:10 | Dauud Cheaib v Guillaume Alcayde | W | 3-2 |
| Challenger Series TT | 2023/09/14 11:10 | Dauud Cheaib v Akito Itagaki | W | 3-1 |
| Challenger Series TT | 2023/09/14 08:30 | Antonin Gavlas v Dauud Cheaib | L | 3-2 |
| Challenger Series TT | 2023/09/08 12:50 | Dennis Klein v Dauud Cheaib | L | 3-0 |
| Challenger Series TT | 2023/09/08 12:05 | Dauud Cheaib v Kirill Fadeev | L | 1-3 |
| Challenger Series TT | 2023/09/08 09:10 | Rafael Turrini v Dauud Cheaib | W | 0-3 |
| Challenger Series TT | 2023/09/08 07:10 | Dauud Cheaib v Kirill Fadeev | L | 1-3 |