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