Stadium: Centre Court Round: 28 Ground: Clay
| Challenger Sopot MD | 2018/08/02 09:00 | Propoggia/Puodziunas v Kowalczyk/Walkow | 2-6,4-6 |
| Challenger Sopot MD | 2018/08/01 09:00 | Majchrzak/Zielinski v Kowalczyk/Walkow | 2-6,6-7 |
| Challenger Poznan - Herredouble | 2018/06/08 14:55 | Kowalczyk/Walkow v Dembek/Zielinski | 7-6,6-3 |
| Challenger Poznan - Herredouble | 2018/06/07 13:30 | Laaksonen/Panfil v Kowalczyk/Walkow | 5-7,6-3,8-10 |
| Challenger Poznan - Herredouble | 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 |
| Challenger Sopot MD | 2018/08/02 10:20 | Agamenone/Manafov v Panfil/Sakharov | 4-6,4-6 |
| Challenger Sopot MD | 2018/07/31 13:50 | Choinski/Haerteis v Panfil/Sakharov | 3-6,2-6 |