| Bulgarian Int. | 2020/10/02 08:00 | Ivan Kovacevic v Iliyan Stoynov | L | 0-2 |
| 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 |