| ITF Poland F3 | 2016/06/07 09:20 | Michal Dembek v Jan Zielinski | 2-6,6-4,2-6 |
| 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 |
| ITF M25 Glasgow | 2020/02/16 17:40 | Jan Zielinski v Euan Mcintosh | 6-4,6-2 |
| ITF M25 Barnstaple | 2020/02/13 11:20 | Kacper Zuk v Jan Zielinski | 3-6,6-0,6-1 |
| 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 11:15 | Maciej Rajski v Michal Dembek | 6-3,3-6,17-15 |
| ITF M15 Loule | 2020/03/10 11:35 | Nicolo Turchetti v Michal Dembek | 6-4,4-6,6-4 |
| ITF M15 Faro | 2020/03/04 10:00 | Yannick Mertens v Michal Dembek | 6-2,7-5 |
| ITF M15 Heraklion | 2020/02/12 09:30 | Michal Dembek v Petros Tsitsipas | 7-5,2-6,6-7 |
| ITF M15 Antalya | 2019/12/17 07:00 | Michal Dembek v Ivan Nedelko | 7-6,5-7,2-6 |
| ITF M15 Antalya Qual | 2019/12/09 07:00 | Michal Dembek v Igor Saveljic | 1-6,6-7 |
| ITF M15 Monastir | 2019/11/27 12:40 | Michal Dembek v Benjamin Lock | 6-7,2-6 |