| Cyprus Int. | 2021/10/15 09:05 | Brian Holtschke v Georgii Lebedev | L | 1-2 |
| Bulgarian Int | 2021/10/08 13:35 | Brian Holtschke v Daniel Nikolov | L | 1-2 |
| Bulgarian Int | 2021/10/08 08:55 | Nicolas A. Mueller v Brian Holtschke | W | 0-2 |
| Ukraine Int. | 2021/09/08 08:40 | Mithun Manjunath v Brian Holtschke | L | 2-0 |
| Hellas Int. | 2021/09/03 12:25 | Brian Holtschke v Wyman Goh | L | 0-2 |
| Denmark Masters Qual | 2021/08/05 07:00 | Gergo Pytel v Brian Holtschke | L | 2-0 |
| Spain Int Qual | 2021/06/17 07:40 | Misbun Ramdan Mohmed Misbun v Brian Holtschke | L | 2-0 |
| Spain Int Qual | 2021/06/16 10:40 | Martin Ouazzen v Brian Holtschke | W | 0-2 |
| Slovenia Int. Qual | 2021/05/19 15:45 | Ivan Kovacevic v Jonas Schwarz | L | 2-0 |
| Portuguese Int. Qual | 2021/05/06 12:30 | Samuel Hsiao v Jonas Schwarz | L | 2-1 |
| Portuguese Int. Qual | 2021/05/06 09:00 | Paulo Silva v Jonas Schwarz | W | 0-2 |
| Lithuanian Int. Qual | 2019/06/06 10:40 | Jonas Schwarz v Markus Barth | L | 1-2 |
| Croatian Int. Qual | 2019/04/18 11:40 | Jonas Schwarz v Rahul Patel | L | 0-2 |
| Swiss Open WD Qual | 2018/11/14 11:30 | Ethan Rose v Jonas Schwarz | L | 2-0 |