Stadium: CC Round: 28 Ground: Clay
| ITF M25 Bydgoszcz | 2019/08/16 13:30 | Denis Yevseyev v Daniel Michalski | 2-6,6-2,2-6 |
| ITF M25 Bydgoszcz | 2019/08/15 08:00 | Daniel Michalski v Vladyslav Manafov | 6-4,6-2 |
| ITF M25 Bydgoszcz | 2019/08/14 08:00 | Gibril Diarra v Daniel Michalski | 7-6,6-7,2-6 |
| ITF M15 Koszalin | 2019/08/09 08:00 | Michal Dembek v Daniel Michalski | 6-2,6-4 |
| ITF M15 Koszalin | 2019/08/08 09:00 | Janis Podzus v Daniel Michalski | 0-6,6-3,1-6 |
| ITF M15 Koszalin | 2019/08/06 14:10 | Michal Wozniak v Daniel Michalski | 1-6,1-6 |
| Challenger Sopot | 2019/07/31 15:00 | Stefano Travaglia v Daniel Michalski | 6-1,6-1 |
| Challenger Sopot | 2019/07/30 13:35 | Michal Przysiezny v Daniel Michalski | 2-6,5-7 |
| ITF M25 Bydgoszcz | 2019/08/16 13:30 | Mohamed Aziz Dougaz v Jan Zielinski | 3-6,3-6 |
| ITF M25 Bydgoszcz | 2019/08/15 08:00 | Jan Zielinski v Yann Wojcik | 6-3,6-4 |
| ITF M25 Bydgoszcz | 2019/08/13 12:00 | Maciej Smola v Jan Zielinski | 3-6,4-6 |
| ITF M15 Wroclaw | 2019/07/03 15:45 | Petr Nouza v Jan Zielinski | 6-1,7-6 |
| ITF M25 Pardubice | 2019/06/25 09:45 | Jan Zielinski v Georgii Kravchenko | 2-6,1-6 |
| ITF M25 Pardubice | 2019/06/24 11:00 | Marek Gengel v Jan Zielinski | 7-5,5-7,9-11 |
| ITF USA F29 | 2018/11/01 20:00 | Jan Zielinski v Haru Inoue | 5-7,5-7 |
| ITF USA F29 | 2018/10/30 16:35 | Cameron Green v Jan Zielinski | 4-6,3-6 |