| Open du Luxembourg - Qualif. | 2024/05/02 13:30 | Jia Wei Joel Koh v Dennis Koppen | W | 1-2 |
| Spanish Int. | 2023/11/14 16:20 | Jakob Houe v Dennis Koppen | L | 2-1 |
| Czech Open | 2023/10/20 08:20 | Wolfgang Gnedt v Dennis Koppen | L | 2-0 |
| Dutch Open | 2023/10/13 14:25 | Dennis Koppen v Ade Resky Dwicahyo | L | 0-2 |
| Dutch Open | 2023/10/12 13:55 | Dennis Koppen v Sanjeevi Padmanabhan Vasudevan | W | 2-1 |
| Dutch Open (GP) 2017, Qualification | 2023/10/11 17:50 | Dennis Koppen v Karl Sufryd | W | 2-0 |
| Dutch Open (GP) 2017, Qualification | 2023/10/11 14:00 | Dennis Koppen v Ivan Rusev | W | 2-1 |
| International de Bonn - Qualif. | 2023/05/31 17:20 | James Robertson v Dennis Koppen | W | 0-2 |
| Open du Luxembourg - Qualif. | 2024/05/02 16:20 | Ditlev Jaeger Holm v Gustav Bjorkler | L | 1-2 |
| Open du Luxembourg - Qualif. | 2024/05/02 07:40 | Ditlev Jaeger Holm v Shao-Hsuan Chen | W | 2-0 |
| Open de Pologne - Qualif. | 2024/03/21 08:20 | Aria Dinata v Ditlev Jaeger Holm | L | 2-1 |
| Open de Pologne - Qualif. | 2024/03/20 18:30 | Andrej Suchy v Ditlev Jaeger Holm | W | 1-2 |
| Open de Pologne - Qualif. | 2024/03/20 08:35 | Ditlev Jaeger Holm v Szymon Stokfisz | W | 2-0 |
| Dutch Int. - | 2024/03/16 09:00 | Ditlev Jaeger Holm v Tharun Mannepalli | L | 1-2 |
| Dutch Int. - | 2024/03/15 18:41 | Ditlev Jaeger Holm v Tharun Mannepalli | L | 1-2 |
| Dutch Int. - | 2024/03/15 13:40 | Harry Huang v Ditlev Jaeger Holm | W | 1-2 |