Estadio: Ochsenhausen, Germany
| Challenger Series TT | 2023/02/27 17:30 | Sven Happek v Dillon Chambers | W | 3-2 |
| Challenger Series TT | 2023/01/12 20:10 | Sven Happek v Dillon Chambers | W | 3-2 |
| Challenger de Ochsenhausen | 2022/05/19 10:30 | Sven Happek v Dillon Chambers | L | 1-3 |
| Challenger de Ochsenhausen | 2022/05/12 11:10 | Dillon Chambers v Sven Happek | L | 3-0 |
| Challenger Series TT | 2022/02/24 18:50 | Sven Happek v Dillon Chambers | L | 1-3 |
| Challenger de Ochsenhausen | 2021/04/01 09:10 | Dillon Chambers v Sven Happek | L | 3-2 |
| Challenger de Ochsenhausen | 2021/03/11 10:50 | Sven Happek v Dillon Chambers | W | 3-2 |
| Challenger de Ochsenhausen | 2021/01/28 07:30 | Sven Happek v Dillon Chambers | L | 0-3 |
| Challenger Series TT | 2023/04/17 07:50 | Sven Happek v Siddharta Almeida | L | 2-3 |
| Challenger Series TT | 2023/04/03 12:30 | Dennis Klein v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/04/03 11:10 | Dauud Cheaib v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/04/03 06:30 | Pekka Pelz v Sven Happek | L | 3-0 |
| TT Star Series | 2023/03/25 11:15 | Henning Zeptner v Sven Happek | W | 0-3 |
| TT Star Series | 2023/03/25 08:10 | Sven Happek v Antonin Gavlas | L | 0-3 |
| TT Star Series | 2023/03/24 14:15 | Sven Happek v Michal Obeslo | L | 0-3 |
| TT Star Series | 2023/03/24 12:45 | Boguslav Koszyk v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/04/17 07:10 | Damian Zech v Dillon Chambers | W | 0-3 |
| Challenger Series TT | 2023/03/28 09:10 | Kirill Fadeev v Dillon Chambers | L | 3-2 |
| Challenger Series TT | 2023/03/28 07:50 | Dillon Chambers v Jeromy Loffler | L | 1-3 |
| Challenger Series TT | 2023/03/27 17:50 | Bohdan Sinkevych v Dillon Chambers | W | 0-3 |
| Challenger Series TT | 2023/03/27 15:50 | Marius Henninger v Dillon Chambers | W | 1-3 |
| Challenger Series TT | 2023/03/27 13:50 | Dauud Cheaib v Dillon Chambers | L | 3-0 |
| Challenger Series TT | 2023/03/27 09:50 | Dennis Klein v Dillon Chambers | W | 2-3 |
| Challenger Series TT | 2023/03/27 07:10 | Makoto Nogami v Dillon Chambers | L | 3-0 |