| Croatia Int. Qual | 2023/09/28 14:40 | Aleksi Maki v Felix Wright | W | 1-2 |
| Croatia Int. Qual | 2023/09/28 10:20 | Felix Wright v Yaro Van Delsen | W | 2-1 |
| Welsh Int. Qual | 2022/11/29 11:40 | Nicolas A. Mueller v Felix Wright | L | 2-0 |
| Croatia Int. Qual | 2023/09/28 15:10 | Edvin Hadzihalilovic v Kai Niederhuber | W | 0-2 |
| Croatia Int. Qual | 2023/09/28 12:15 | Sebastian Kadlec v Kai Niederhuber | W | 0-2 |
| Polish Int. Qual | 2023/09/21 10:20 | Kai Niederhuber v Arun Kumar Ashok Kumar | W | 2-0 |
| Polish Int. | 2023/09/21 10:00 | Kai Niederhuber v Aaron Sonnenschein | L | 1-2 |
| Polish Int. Qual | 2023/09/21 07:40 | Kai Niederhuber v Maksymilian Krogulski | W | 2-0 |
| Slovenia Future Series | 2023/09/08 08:45 | Jeppe Bruun Christensen v Kai Niederhuber | L | 2-1 |
| Bonn Int. Qual | 2023/05/31 09:10 | Kai Niederhuber v David K Kristensen | L | 0-2 |
| Austrian Open Qual | 2023/05/25 09:55 | Kai Niederhuber v Jia Jie Tan | L | 0-2 |