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