Round: 1
| ITF M25 Poznan | 2019/08/20 08:00 | Drzewiecki, Karol v Kolasinski, Filip | 7-5,5-7,10-12 |
| Polish National Tour | 2020/06/17 13:57 | Pawel Juszczak v Drzewiecki, Karol | 0-0 |
| Polish National Tour | 2020/06/17 07:00 | Drzewiecki, Karol v Galus, Piotr | 6-1,7-5 |
| Palm Coast, Singles M-ITF-USA-05A | 2020/02/03 18:00 | Pla Malfeito, Jaume v Drzewiecki, Karol | 6-4,6-3 |
| ITF M25 Weston | 2020/01/28 14:00 | Gomez, Alejandro v Drzewiecki, Karol | 7-5,6-3 |
| ITF M25 Weston | 2020/01/27 15:30 | Michael Zhu v Drzewiecki, Karol | 6-2,1-6,5-10 |
| ITF M25 Weston | 2020/01/26 15:30 | Drzewiecki, Karol v Bergevi, Filip | 6-3,6-2 |
| ITF M25 Rancho Santa Fe | 2020/01/14 17:30 | Facundo Diaz Acosta v Drzewiecki, Karol | 6-2,6-4 |
| ITF M25 Rancho Santa Fe | 2020/01/13 18:00 | Drzewiecki, Karol v Rapp, Austin | 6-4,6-4 |
| Polish National Tour | 2020/07/14 16:00 | Kacper Zuk v Kolasinski, Filip | 5-7,6-4,6-2 |
| Polish National Tour | 2020/06/22 08:35 | Zielinski, Jan v Kolasinski, Filip | 6-4,6-3 |
| Polish National Tour | 2020/06/21 14:00 | Kolasinski, Filip v Marek, Wojciech | 7-5,6-2 |
| Polish National Tour | 2020/06/21 08:00 | Galus, Piotr v Kolasinski, Filip | 6-3,4-6,1-6 |
| Polish National Tour | 2020/06/18 07:00 | Kacper Zuk v Kolasinski, Filip | 4-6,6-0,6-3 |
| Polish National Tour | 2020/06/17 08:30 | Maks Kasnikowski v Kolasinski, Filip | 4-6,3-6 |
| Marbello Cup Exhibition Series | 2020/06/10 08:20 | Gajewski, Kamil v Kolasinski, Filip | 4-6,2-6 |
| Marbello Cup Exhibition Series | 2020/06/09 12:20 | Kolasinski, Filip v Mikula, Michal | 3-6,4-6 |