| 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 |
| Litauen - Int. - Kval | 2019/06/06 10:40 | Jonas Schwarz v Markus Barth | L | 1-2 |
| Kroatien Int. - Kval | 2019/04/18 11:40 | Jonas Schwarz v Rahul Patel | L | 0-2 |
| Swiss Open - Damdubbel - Kval | 2018/11/14 11:30 | Ethan Rose v Jonas Schwarz | L | 2-0 |