| Bonn Int. Qual | 2024/05/29 11:00 | Thomas Fourcade v Kai Niederhuber | W | 1-2 |
| Austrian Open Qual | 2024/05/23 13:05 | Kai Niederhuber v Eogene Ewe | L | 0-2 |
| Austrian Open Qual | 2024/05/23 09:05 | Tony Lindelof v Kai Niederhuber | W | 0-2 |
| Slovenia Open Quals | 2024/05/16 12:20 | Ansal Yadav v Kai Niederhuber | L | 2-1 |
| Slovenia Open Quals | 2024/05/16 11:40 | Kai Niederhuber v Koushiik C. S | W | 2-0 |
| Slovenia Open Quals | 2024/05/15 14:50 | Christian Tomic v Kai Niederhuber | W | 0-2 |
| Portugal Int. Qual | 2024/03/06 15:40 | Kai Niederhuber v Garret Tan | L | 1-2 |
| Hungarian Int. Qual | 2023/11/01 15:20 | Enrico Baroni v Kai Niederhuber | L | 2-0 |
| Bonn Int. Qual | 2024/05/29 07:40 | Jing Yi Gavin Ng v Camilo Borst | W | 2-0 |
| Austrian Open Qual | 2024/05/23 08:35 | Jing Yi Gavin Ng v Jan Janostik | L | 0-2 |
| Slovenia Open Quals | 2024/05/15 09:40 | Yu-Kai Wang v Jing Yi Gavin Ng | L | 2-0 |