| Marbello Cup Exhibition Series | 2020/06/03 08:50 | Zielinski, Jan v Dembek, Michal | 7-6,5-7,10-4 |
| ITF Poland F3 | 2016/06/07 09:20 | Dembek, Michal v Zielinski, Jan | 2-6,6-4,2-6 |
| Polish National Tour | 2020/07/30 09:45 | Piotr Grynkowski v Zielinski, Jan | 2-6,6-4,2-6 |
| Polish National Tour | 2020/07/25 09:35 | Jasza Szajrych v Zielinski, Jan | 2-6,6-2,6-4 |
| Polish National Tour | 2020/07/17 12:45 | Zielinski, Jan v Daniel Michalski | 2-6,1-6 |
| Polish National Tour | 2020/07/09 11:00 | Daniel Michalski v Zielinski, Jan | 6-3,6-1 |
| Polish National Tour | 2020/07/08 13:00 | Zielinski, Jan v Kacper Zuk | 6-4,6-3 |
| Polish National Tour | 2020/06/23 08:00 | Kacper Zuk v Zielinski, Jan | 6-2,3-6,6-2 |
| Polish National Tour | 2020/06/22 08:35 | Zielinski, Jan v Kolasinski, Filip | 6-4,6-3 |
| Marbello Cup Exhibition Series | 2020/06/05 08:20 | Kolasinski, Filip v Zielinski, Jan | 0-6,7-5,7-10 |
| Polish National Tour | 2020/07/30 10:00 | Kolasinski, Filip v Dembek, Michal | 4-6,3-6 |
| Polish National Tour | 2020/07/29 07:00 | Cislo, Mateusz v Dembek, Michal | 1-6,1-6 |
| Polish National Tour | 2020/07/27 08:00 | Kamil Majchrzak v Dembek, Michal | 6-3,7-5 |
| Polish National Tour | 2020/07/26 07:00 | Dembek, Michal v Maciej Rajski | 2-6,6-3,6-4 |
| Polish National Tour | 2020/07/25 08:10 | Dembek, Michal v Mikula, Michal | 6-3,6-4 |
| Polish National Tour | 2020/07/08 11:00 | Dembek, Michal v Maciej Rajski | 2-6,2-6 |
| Polish National Tour | 2020/07/07 12:10 | Dembek, Michal v Piotr Grynkowski | 7-6,6-1 |
| Polish National Tour | 2020/07/06 09:00 | Dembek, Michal v Dworak, Kacper | 6-4,6-0 |