Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/09/19 09:50 | Sven Happek v Alvaro Gainza | W | 1-3 |
| Challenger Series TT | 2023/04/25 08:30 | Sven Happek v Alvaro Gainza | W | 0-3 |
| Challenger Series TT | 2023/02/27 18:50 | Sven Happek v Alvaro Gainza | L | 3-1 |
| Challenger Ochsenhausen | 2022/05/19 16:30 | Alvaro Gainza v Sven Happek | L | 1-3 |
| Challenger Series TT | 2023/12/07 14:50 | Alvaro Gainza v Max Klink | W | 3-0 |
| Challenger Series TT | 2023/12/07 11:30 | Alexander Valuch v Alvaro Gainza | L | 3-1 |
| Challenger Series TT | 2023/12/07 08:50 | Miguel Nunez v Alvaro Gainza | L | 3-2 |
| TT Star Series | 2023/09/30 11:45 | Alvaro Gainza v Oleksandr Tymofieiev | L | 1-3 |
| TT Star Series | 2023/09/30 08:45 | Alvaro Gainza v Aly Ghallab | L | 0-3 |
| TT Star Series | 2023/09/30 06:35 | Alvaro Gainza v Michal Bankosz | L | 0-3 |
| TT Star Series | 2023/09/29 12:45 | Alvaro Gainza v Amirreza Abbasi | L | 0-3 |
| TT Star Series | 2023/09/29 10:15 | Alvaro Gainza v Jiri Martinko | L | 0-3 |
| 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 |
| Challenger Series TT | 2023/11/13 18:10 | Akito Itagaki v Sven Happek | L | 3-2 |
| Challenger Series TT | 2023/11/13 16:10 | Martin Baechler v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/11/13 13:30 | Alexander Valuch v Sven Happek | L | 3-1 |