Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/11/13 12:10 | Dauud Cheaib v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/10/09 17:10 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/09/18 09:10 | Sven Happek v Dauud Cheaib | L | 0-3 |
| 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 | 2023/12/08 10:10 | Mike Hollo v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/12/08 08:50 | Sven Happek v Max Klink | W | 3-1 |
| Challenger Series TT | 2023/12/07 16:50 | Alvaro Gainza v Sven Happek | W | 2-3 |
| Challenger Series TT | 2023/12/07 13:30 | Alexander Valuch v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/12/07 10:50 | Miguel Nunez v Sven Happek | L | 3-2 |
| Challenger Series TT | 2023/12/07 08:10 | Samuel Amann v Sven Happek | W | 0-3 |
| Challenger Series TT | 2023/11/14 09:30 | Liang Qiu v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/11/14 08:10 | Vidit Desai v Sven Happek | W | 0-3 |
| Challenger Series TT | 2023/12/05 13:50 | Dauud Cheaib v Corentin Mazaud | W | 3-0 |
| Challenger Series TT | 2023/12/05 12:25 | Dauud Cheaib v Carlo Rossi | L | 2-3 |
| Challenger Series TT | 2023/12/05 10:10 | Dauud Cheaib v Daniel Rinderer | W | 3-1 |
| Challenger Series TT | 2023/12/04 20:50 | Dauud Cheaib v Damian Zech | W | 3-1 |
| Challenger Series TT | 2023/12/04 18:10 | Dauud Cheaib v Rafael Turrini | L | 2-3 |
| Challenger Series TT | 2023/12/04 15:30 | Alexander Valuch v Dauud Cheaib | W | 0-3 |
| Challenger Series TT | 2023/12/04 12:50 | Carlo Rossi v Dauud Cheaib | W | 0-3 |
| Challenger Series TT | 2023/12/04 10:50 | Dauud Cheaib v Akito Itagaki | W | 3-0 |