| 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 |