| Polish Open Qual | 2023/03/22 16:10 | Brian Holtschke v Collins Valentine Filimon | L | 0-2 |
| Portugal Int. Qual | 2023/03/08 18:10 | Yohan Barbieri v Brian Holtschke | W | 0-2 |
| Iceland Int. | 2023/01/27 14:50 | Brian Holtschke v Valentin Singer | L | 1-2 |
| Estonian Int. Qual | 2023/01/12 14:00 | Christian Faust Kjaer v Brian Holtschke | L | 2-0 |
| Estonian Int. Qual | 2023/01/12 11:05 | Raul Must v Brian Holtschke | W | 0-2 |
| Estonian Int. Qual | 2023/01/12 08:35 | Rakesh Sharma v Brian Holtschke | W | 0-2 |
| Latvia Int. | 2022/09/02 07:00 | Brian Holtschke v Christopher Vittoriani | L | 0-2 |
| Croatia Open | 2022/06/21 14:55 | Brian Holtschke v Dumindu Abeywickrama | L | 0-2 |
| China Masters | 2023/03/15 08:15 | Jhuo-Fu Liao v Chen Xun Zhao | L | 2-0 |