Stadium: Court 5 Round: 25
| ITF Poland F1 | 2015/08/09 08:00 | Maciej Nowak v Piotr Grynkowski | 6-4,7-6 |
| ITF Poland F9 Qual | 2017/08/14 11:50 | Piotr Grynkowski v Maximilian Kaiser | 6-4,6-1 |
| ITF Poland F9 Qual | 2017/08/13 10:30 | Piotr Grynkowski v Mikolaj Borkowski | 6-2,7-6 |
| Challenger Poznan Qual | 2017/07/15 09:00 | Piotr Grynkowski v Norbert Tadyszak | 6-3,6-3 |
| ITF Poland F4 Qual | 2017/07/03 08:00 | Mattias Siimar v Piotr Grynkowski | 6-2,6-2 |
| ITF Poland F4 Qual | 2017/07/02 13:00 | Martins Rocens v Piotr Grynkowski | 4-6,2-6 |
| ITF Poland F3 | 2017/06/27 13:40 | Piotr Grynkowski v Markus Eriksson | 2-6,2-6 |
| ITF Poland F2 | 2017/06/18 08:30 | Piotr Grynkowski v Szymon Walkow | 1-6,6-3,3-6 |
| ITF Turkey F17 | 2017/05/01 07:30 | Gorazd Srbljak v Piotr Grynkowski | 6-3,6-2 |
| ITF Poland F8 | 2017/08/01 15:40 | Maciej Nowak v Marco Neubau | 4-6,6-4,3-6 |
| ITF Poland F7 Qual | 2017/07/23 11:00 | Marco Neubau v Maciej Nowak | 7-6,6-3 |
| ITF Poland F6 | 2017/07/18 12:30 | Maciej Nowak v Daniil Zarichanskiy | 6-3,3-6,2-6 |
| ITF Poland F6 Qual | 2017/07/17 08:00 | Maciej Nowak v Adam Mlazga | 2-6,6-2,6-4 |
| ITF Poland F6 Qual | 2017/07/16 11:00 | Jonathan Morr v Maciej Nowak | 2-6,3-6 |
| ITF Israel F12 | 2017/06/24 08:00 | Maciej Nowak v Franco Ribero | 5-7,5-7 |
| ITF Israel F11 | 2017/06/17 07:00 | Jordan Hasson v Maciej Nowak | 6-2,7-5 |
| ITF Israel F6 | 2017/05/08 07:00 | Danny Thomas v Maciej Nowak | 6-2,6-3 |