Stadium: Central Court
| ITF M25 Nussloch | 2020/01/20 16:00 | Leopold Zima v Jan Zielinski | 6-4,7-6 |
| ITF M25 Nussloch | 2020/01/20 10:25 | Marcus Mansson v Jan Zielinski | 7-6,4-6,8-10 |
| ITF M25 Nussloch | 2020/01/19 09:00 | Fred Olivier Schommer v Jan Zielinski | 2-6,2-6 |
| ITF M15 Heraklion | 2019/11/17 08:30 | Alexander Erler v Jan Zielinski | 7-5,6-1 |
| ITF M15 Heraklion | 2019/11/16 12:00 | Jan Zielinski v Patrick Kypson | 6-4,6-2 |
| ITF M15 Heraklion | 2019/11/16 08:00 | Jan Zielinski v Jonas Trinker | 6-3,6-2 |
| ITF M15 Heraklion | 2019/11/15 08:00 | Jan Zielinski v Vasil Kirkov | 6-3,6-3 |
| ITF M15 Heraklion | 2019/11/12 13:05 | Tom Kocevar-Desman v Jan Zielinski | 1-6,4-6 |
| 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 |
| ITF M25 Poznan | 2019/08/20 08:00 | Karol Drzewiecki v Filip Kolasinski | 7-5,5-7,10-12 |
| ITF M15 Irpin | 2019/08/14 07:30 | Vladyslav Orlov v Filip Kolasinski | 6-1,6-4 |
| ITF M15 Irpin | 2019/08/13 10:20 | Filip Kolasinski v Aleksandr Braynin | 6-4,6-0 |
| ITF M15 Irpin | 2019/08/12 12:00 | Simonas Zukauskas v Filip Kolasinski | 1-6,1-6 |