Stadium: Ochsenhausen, Germany
| 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 | 2023/11/13 18:10 | Akito Itagaki v Sven Happek | L | 3-2 |
| Challenger Series TT | 2023/11/13 16:10 | Martin Baechler v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/11/13 13:30 | Alexander Valuch v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/11/13 12:10 | Dauud Cheaib v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/11/13 07:30 | Dennis Klein v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/10/10 09:10 | Sven Happek v Armin Alicic | L | 0-3 |