| International de Bonn - Qualif. | 2023/05/31 10:30 | Rui Yang Ryan Tan v Jan Janostik | L | 2-1 |
| Austrian Open - Qualif. | 2023/05/25 11:00 | Jan Janostik v Dani, Harsheel | L | 0-2 |
| Austrian Open - Qualif. | 2023/05/25 08:35 | Jan Janostik v Kumar, Dhruv | W | 2-0 |
| Open de Pologne - Qualif. | 2023/03/22 09:10 | Edison, Keith Mark v Jan Janostik | L | 2-0 |
| Slovenia Future Series Qual | 2022/11/25 09:45 | Guilhem Hoyaux v Jan Janostik | L | 2-0 |
| Slovenia Future Series Qual | 2022/11/24 18:50 | Sebastian Mikkelsen v Jan Janostik | W | 0-2 |
| Czech Open | 2022/10/21 08:00 | Jan Janostik v Julien Scheiwiller | L | 0-2 |
| Czech Open Qual | 2022/10/20 18:40 | Maj Poboljsaj v Jan Janostik | W | 0-2 |