| Marbello Cup Exhibition Series | 2020/06/03 16:10 | Mateusz Terczynski v Filip Kolasinski | 2-6,6-7 |
| Marbello Cup Exhibition Series | 2020/06/03 11:20 | Maciej Rajski v Filip Kolasinski | 4-6,7-5,3-10 |
| Marbello Cup Exhibition Series | 2020/06/02 17:15 | Michal Dembek v Filip Kolasinski | 4-6,6-2,10-7 |
| Marbello Cup Exhibition Series | 2020/06/02 09:10 | Daniel Michalski v Filip Kolasinski | 2-6,6-7 |
| Challenger Szczecin | 2019/09/11 11:30 | Filip Kolasinski v Facundo Arguello | 4-6,6-7 |
| Challenger Szczecin | 2019/09/10 16:15 | Filip Kolasinski v Louis Wessels | 6-3,7-5 |
| ITF M25 Poznan | 2019/08/22 14:25 | Diego Hidalgo v Filip Kolasinski | 6-3,7-5 |
| ITF M25 Poznan | 2019/08/21 10:00 | Piotr Matuszewski v Filip Kolasinski | 2-6,6-4,5-7 |
| Marbello Cup Exhibition Series | 2020/06/03 14:40 | Maciej Rajski v Jan Zielinski | 4-6,4-6 |
| Marbello Cup Exhibition Series | 2020/06/03 08:50 | Jan Zielinski v Michal Dembek | 7-6,5-7,10-4 |
| Marbello Cup Exhibition Series | 2020/06/02 13:30 | Daniel Michalski v Jan Zielinski | 6-0,5-7,8-10 |
| Marbello Cup Exhibition Series | 2020/06/02 07:00 | Jan Zielinski v Mateusz Terczynski | 4-6,6-3,10-6 |
| ITF M25 Sunderland | 2020/02/24 11:40 | Jan Zielinski v George Houghton | 4-6,6-3,7-10 |
| ITF M25 Sunderland | 2020/02/23 13:05 | Jan Zielinski v Harry Meehan | 4-6,6-4,11-9 |
| ITF M25 Glasgow | 2020/02/19 10:00 | Jan Zielinski v Antoine Bellier | 4-6,4-6 |
| ITF M25 Glasgow | 2020/02/17 14:25 | Jan Zielinski v Hendrik Jebens | 4-6,2-6 |