Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/04/25 08:30 | Sven Happek v Alvaro Gainza | L | 0-3 |
| Challenger Series TT | 2023/02/27 18:50 | Sven Happek v Alvaro Gainza | W | 3-1 |
| Challenger Ochsenhausen | 2022/05/19 16:30 | Alvaro Gainza v Sven Happek | W | 1-3 |
| Challenger Series TT | 2023/06/27 09:50 | Marius Henninger v Sven Happek | L | 3-2 |
| Challenger Series TT | 2023/06/27 08:30 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Series TT | 2023/06/26 18:30 | Benjamin Fruchart v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/06/26 15:50 | Antonin Gavlas v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/06/26 13:50 | Carlo Rossi v Sven Happek | L | 3-2 |
| Challenger Series TT | 2023/06/26 09:50 | Damian Zech v Sven Happek | W | 2-3 |
| Challenger Series TT | 2023/06/26 07:10 | Makoto Nogami v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/06/23 09:10 | Sven Happek v Carlo Rossi | L | 2-3 |
| Challenger Series TT | 2023/08/18 07:50 | Daniel Rinderer v Alvaro Gainza | L | 3-0 |
| Challenger Series TT | 2023/08/17 19:50 | Kirill Fadeev v Alvaro Gainza | L | 3-2 |
| Challenger Series TT | 2023/08/17 17:50 | Marco Stefanidis v Alvaro Gainza | L | 3-1 |
| Challenger Series TT | 2023/08/17 15:50 | Alvaro Gainza v Tobias Slanina | W | 3-1 |
| Challenger Series TT | 2023/08/17 13:10 | Alvaro Gainza v Makoto Nogami | L | 2-3 |
| Challenger Series TT | 2023/08/17 11:10 | Alvaro Gainza v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/08/17 08:30 | Marius Henninger v Alvaro Gainza | L | 3-0 |
| TT Star Series | 2023/05/20 10:45 | Martin Olejnik v Alvaro Gainza | W | 0-3 |