| Hungarian Int. Qual | 2022/11/02 14:25 | Bruno Carvalho v Kai Niederhuber | W | 0-2 |
| Luxembourg Open Qual | 2023/05/04 10:30 | Ramnish Kumar v Kai Niederhuber | W | 0-2 |
| Polish Open Qual | 2023/03/22 16:00 | Matthias Kicklitz v Kai Niederhuber | L | 2-0 |
| Polish Open Qual | 2023/03/22 08:00 | Daniel Dvorak v Kai Niederhuber | W | 0-2 |
| Slovenia Future Series Qual | 2022/11/24 12:40 | Kai Niederhuber v Paul Tournefier | L | 0-2 |
| Hungarian Int. | 2022/11/03 13:20 | Chun-Yi Lin v Kai Niederhuber | L | 2-0 |
| Hungarian Int. Qual | 2022/11/03 08:35 | Sebastian Lassen Nielsen v Kai Niederhuber | W | 0-2 |
| Hungarian Int. Qual | 2022/11/02 19:05 | Kai Niederhuber v Nicolai Condratiuc | W | 2-0 |
| Hungarian Int. Qual | 2022/11/02 14:25 | Bruno Carvalho v Kai Niederhuber | W | 0-2 |
| Luxembourg Open Qual | 2023/05/04 10:30 | Bruno Carvalho v Idan Schneidman | W | 2-0 |
| Dutch Int. Qual | 2023/04/13 14:40 | Bruno Carvalho v Daniel Zhou | W | 2-1 |
| Dutch Int. Qual | 2023/04/13 10:10 | Bruno Carvalho v Shao-Hsuan Chen | W | 2-1 |
| Portugal Int. Qual | 2023/03/08 11:30 | Bruno Carvalho v David K Kristensen | L | 0-2 |
| Norwegian Int. | 2022/11/11 10:00 | Bruno Carvalho v Christopher Vittoriani | L | 0-2 |
| Norwegian Int. Qual | 2022/11/10 15:00 | Bruno Carvalho v Oleksii Titov | W | 2-0 |
| Hungarian Int. Qual | 2022/11/02 14:25 | Bruno Carvalho v Kai Niederhuber | L | 0-2 |
| Hungarian Int. Qual | 2022/11/02 09:10 | Joseph Waugh v Bruno Carvalho | W | 0-2 |