Stadium: Centre Court Round: 26 Ground: Clay
| ITF Poland F1 MD | 2017/06/15 13:30 | Majchrzak/Zielinski v Libietis/Reese | 3-6,6-4,5-10 |
| ITF Poland F1 MD | 2017/06/14 11:25 | Majchrzak/Zielinski v Gajewski/Walkow | 6-3,4-6,10-5 |
| ITF Poland F1 MD | 2017/06/13 13:35 | Appelgren/Mridha v Majchrzak/Zielinski | 2-6,4-6 |
| Challenger - Szczecin - mužská štvorhra | 2015/09/14 15:00 | Gaio/Giannessi v Majchrzak/Zielinski | 6-3,6-2 |
| Challenger - Poznań - mužská štvorhra | 2018/06/08 14:55 | Kowalczyk/Walkow v Dembek/Zielinski | 7-6,6-3 |
| Challenger - Poznań - mužská štvorhra | 2018/06/07 13:30 | Laaksonen/Panfil v Kowalczyk/Walkow | 5-7,6-3,8-10 |
| Challenger - Poznań - mužská štvorhra | 2018/06/06 16:00 | Kowalczyk/Walkow v Daniel/Zapata Miralles | 7-6,6-1 |
| ITF Czech Republic F8 MD | 2017/11/05 09:30 | Drzewiecki/Smola v Kowalczyk/Walkow | 7-6,6-7,10-8 |
| ITF Czech Republic F8 MD | 2017/11/04 12:00 | Jaloviec/Michnev v Kowalczyk/Walkow | 4-6,4-6 |
| ITF Czech Republic F8 MD | 2017/11/02 15:00 | Hajek/Konecny v Kowalczyk/Walkow | 4-6,6-7 |
| ITF Czech Republic F7 MD | 2017/10/28 13:30 | Kowalczyk/Walkow v Lootsma/Poljak | 6-2,4-6,6-10 |
| ITF Czech Republic F7 MD | 2017/10/28 10:00 | Kowalczyk/Walkow v Gengel/Papik | 6-4,5-7,10-3 |