Round: 26 Ground: Clay
| ITF Poland F1 MD | 2018/04/30 16:05 | Den Heijer G / van Der Horst T v Kowalczyk M / Kozielski L | 6-3,3-6,10-6 |
| ITF Croatia F3 MD | 2018/03/23 14:30 | Celebic L / Nagy P v Kowalczyk M / Kozielski L | 6-2,6-2 |
| ITF Croatia F3 MD | 2018/03/20 13:00 | Antonescu V / Dima D v Kowalczyk M / Kozielski L | 6-7,6-7 |
| Allemagne F2, Doubles | 2018/01/23 13:30 | Kowalczyk M / Kozielski L v Hassan B / Schell N | 2-6,6-4,6-10 |
| ITF Egypt F38 MD | 2017/12/15 08:00 | Kowalczyk M / Kozielski L v Goveas A / Kadhe A | 4-6,3-6 |
| ITF Egypt F37 MD | 2017/12/05 13:45 | Fellin M / Weis A v Kowalczyk M / Kozielski L | 2-6,6-3,10-7 |
| ITF Poland F8 MD | 2017/08/01 17:00 | Dembek M / Smola M v Kowalczyk M / Kozielski L | 6-2,6-2 |