Ground: Clay
| ITF Poland F4 MD | 2018/05/22 14:55 | Kossek D / Poljak D v Bedra M / Galka J | 6-4,6-7,8-10 |
| ITF Poland F4 MD | 2018/05/22 13:30 | Besada S / Den Heijer G v Grzegorczyk J / Kowalczyk M | 3-6,5-7 |
| ITF Poland F11 MD | 2017/08/30 14:30 | Dembek M / Gawron M v Grzegorczyk J / Kowalczyk M | 6-4,6-2 |
| ITF Poland F10 MD | 2017/08/24 13:50 | Dembek M / Hurkacz H v Grzegorczyk J / Kowalczyk M | 6-1,6-4 |
| ITF Poland F10 MD | 2017/08/23 10:30 | Ivanov V / Kerner M v Grzegorczyk J / Kowalczyk M | 1-6,2-6 |
| ITF Poland F10 MD | 2017/08/21 12:25 | Grzegorczyk J / Kowalczyk M v Kolisnyk O / Prihodko O | 6-2,7-5 |
| ITF Czech Republic F3 MD | 2017/06/02 12:00 | Michnev P / Vocel M v Grzegorczyk J / Kowalczyk M | 6-4,6-3 |
| ITF Czech Republic F3 MD | 2017/06/01 11:30 | Mertl J / Stanek R v Grzegorczyk J / Kowalczyk M | 2-6,2-6 |