Stadium: Court 2 Round: 25
| ITF Poland F5 Qual | 2016/08/16 08:00 | Piotr Grynkowski v Adam Chadaj | 2-6,6-3,2-6 |
| ITF Poland F9 | 2017/08/16 10:20 | Piotr Grynkowski v Boy Westerhof | 1-6,4-6 |
| ITF Poland F9 | 2017/08/15 10:30 | Piotr Grynkowski v Maciej Nowak | 5-7,6-1,6-3 |
| 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 F10 | 2017/08/23 09:00 | Artem Smirnov v Adam Chadaj | 7-6,6-2 |
| ITF Poland F10 | 2017/08/22 08:00 | Volodymyr Uzhylovskyi v Adam Chadaj | 4-6,3-6 |
| ITF Poland F9 | 2017/08/18 09:00 | Adam Chadaj v Aleksandar Vukic | 5-7,3-6 |
| ITF Poland F9 | 2017/08/16 08:00 | Artem Smirnov v Adam Chadaj | 1-6,5-7 |
| ITF Poland F9 | 2017/08/15 13:10 | Volodymyr Uzhylovskyi v Adam Chadaj | 7-5,3-6,4-6 |
| ITF Poland F9 Qual | 2017/08/14 08:00 | Adam Chadaj v Daniil Tsebrenko | 6-1,6-3 |
| ITF Poland F9 Qual | 2017/08/13 08:00 | Adam Chadaj v Tomas Vaise | 6-1,6-3 |
| ITF Poland F6 | 2017/07/23 08:00 | Richard Gabb v Adam Chadaj | 1-6,3-6 |