Stadium: Centre Court Round: 28 Ground: Clay
| Sopot, Pologne, Doubles | 2018/08/02 09:00 | Propoggia D / Puodziunas S v Kowalczyk M / Walkow S | 2-6,4-6 |
| Sopot, Pologne, Doubles | 2018/08/01 09:00 | Majchrzak/Zielinski v Kowalczyk M / Walkow S | 2-6,6-7 |
| 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 |
| Sopot, Pologne, Doubles | 2018/08/02 10:20 | Agamenone F / Manafov V v Panfil G / Sakharov G | 4-6,4-6 |
| Sopot, Pologne, Doubles | 2018/07/31 13:50 | Choinski J / Haerteis J v Panfil G / Sakharov G | 3-6,2-6 |