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 | 2023/09/19 06:30 | Sven Happek v Jong-Eon Yeon | L | 2-3 |
| Challenger Series TT | 2023/09/18 17:50 | Sven Happek v Sudhanshu Grover | L | 1-3 |
| Challenger Series TT | 2023/09/18 16:30 | Sven Happek v Louis Reuseau | W | 3-2 |
| Challenger Series TT | 2023/09/18 11:50 | Sven Happek v Louis Price | L | 0-3 |
| Challenger Series TT | 2023/09/18 09:10 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/09/18 06:30 | Sven Happek v Liang Qiu | L | 2-3 |
| 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 | 2023/09/19 08:30 | Alvaro Gainza v Liang Qiu | L | 1-3 |
| Challenger Series TT | 2023/09/18 18:30 | Jong-Eon Yeon v Alvaro Gainza | W | 2-3 |
| Challenger Series TT | 2023/09/18 15:50 | Sudhanshu Grover v Alvaro Gainza | L | 3-0 |
| Challenger Series TT | 2023/09/18 13:50 | Louis Reuseau v Alvaro Gainza | W | 1-3 |
| Challenger Series TT | 2023/09/18 09:50 | Louis Price v Alvaro Gainza | W | 2-3 |
| Challenger Series TT | 2023/09/18 07:10 | Dauud Cheaib v Alvaro Gainza | L | 3-0 |
| 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 |