| Luxembourg Open - Qualifikation | 2023/05/04 09:55 | Finn Achthoven v Enrico Baroni | W | 2-0 |
| Dutch International - Qualifikation | 2023/04/13 08:15 | Finn Achthoven v Keisuke Fujiwara | L | 0-2 |
| Portugal International - Qualifikation | 2023/03/08 09:30 | Finn Achthoven v Aria Dinata | L | 0-2 |
| Estonian International - Qualifikation | 2023/01/12 09:20 | Viktor Ording Kauffman v Finn Achthoven | L | 2-0 |
| Hungarian International - Qualifikation | 2022/11/02 10:20 | Finn Achthoven v Mateusz Danielak | L | 1-2 |
| Czech Open - Qualifikation | 2022/10/20 15:10 | Yu Kai Huang v Finn Achthoven | L | 2-0 |
| Czech Open - Qualifikation | 2022/10/20 08:45 | Finn Achthoven v Tomas Patera | W | 2-0 |
| Dutch Open - Qualifikation | 2022/10/12 07:35 | Finn Achthoven v Sid Palakkal | W | 2-0 |
| Luxembourg Open - Qualifikation | 2023/05/04 10:10 | Jacob Hjorth v Brian Holtschke | W | 1-2 |
| Dutch International - Qualifikation | 2023/04/13 08:15 | Brian Holtschke v Samuel Lee | L | 1-2 |
| Polish Open - Qualifikation | 2023/03/22 16:10 | Brian Holtschke v Collins Valentine Filimon | L | 0-2 |
| Portugal International - Qualifikation | 2023/03/08 18:10 | Yohan Barbieri v Brian Holtschke | W | 0-2 |
| Iceland International | 2023/01/27 14:50 | Brian Holtschke v Valentin Singer | L | 1-2 |
| Estonian International - Qualifikation | 2023/01/12 14:00 | Christian Faust Kjaer v Brian Holtschke | L | 2-0 |
| Estonian International - Qualifikation | 2023/01/12 11:05 | Raul Must v Brian Holtschke | W | 0-2 |
| Estonian International - Qualifikation | 2023/01/12 08:35 | Rakesh Sharma v Brian Holtschke | W | 0-2 |