| Challenger Series TT | 2023/04/03 06:30 | Pekka Pelz v Sven Happek | L | 3-0 |
| Challenger Ochsenhausen | 2021/03/15 16:20 | Pekka Pelz v Sven Happek | L | 3-1 |
| Challenger Series TT | 2024/03/04 12:10 | Sven Happek v Eusebio Vos | W | 3-2 |
| Challenger Series TT | 2024/03/04 09:30 | Marius Henninger v Sven Happek | L | 3-0 |
| Challenger Series TT | 2024/02/27 11:30 | Alexander Valuch v Sven Happek | L | 3-1 |
| Challenger Series TT | 2024/02/27 07:30 | Akito Itagaki v Sven Happek | W | 1-3 |
| Challenger Series TT | 2024/02/26 19:30 | Sven Happek v Mohammed Javad Sohrabi | L | 0-3 |
| Challenger Series TT | 2024/02/26 16:10 | Sven Happek v Haruki Harada | L | 1-3 |
| Challenger Series TT | 2024/02/26 14:10 | Dennis Klein v Sven Happek | L | 3-0 |
| Challenger Series TT | 2024/02/26 11:30 | Liang Qiu v Sven Happek | L | 3-0 |
| Challenger Series TT | 2024/03/04 11:30 | Marius Henninger v Pekka Pelz | L | 3-0 |
| Challenger Series TT | 2024/03/04 08:50 | Zhenlong Liu v Pekka Pelz | L | 3-0 |
| Challenger Series TT | 2023/05/19 08:30 | Amirreza Abbasi v Pekka Pelz | L | 3-0 |
| Challenger Series TT | 2023/05/19 07:10 | Peter Hribar v Pekka Pelz | W | 2-3 |
| Challenger Series TT | 2023/05/18 17:10 | Marius Henninger v Pekka Pelz | L | 3-0 |
| Challenger Series TT | 2023/05/18 15:10 | Antonin Gavlas v Pekka Pelz | L | 3-0 |
| Challenger Series TT | 2023/05/18 12:30 | Florian Bluhm v Pekka Pelz | L | 3-0 |
| Challenger Series TT | 2023/05/18 11:10 | Louis Price v Pekka Pelz | W | 1-3 |