Stadium: Centre Court Round: 62
| 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 Turkey F16 | 2017/04/25 07:00 | Volodymyr Uzhylovskyi v Piotr Grynkowski | 2-6,6-2,6-1 |
| ITF Poland F9 Qual | 2017/08/13 10:30 | Mikolaj Szmyrgala v Maximilian Kaiser | 1-6,3-6 |
| ITF Germany F9 | 2017/07/30 13:30 | Maximilian Kaiser v Christophe Tholl | 6-4,2-6,3-6 |
| ITF USA F30 | 2016/09/24 18:00 | Maximilian Kaiser v Mousheg Hovhannisyan | 1-6,1-6 |
| ITF USA F29 | 2016/09/19 18:30 | Nicolas Moreno De Alboran v Maximilian Kaiser | 7-5,6-2 |
| ITF USA F29 | 2016/09/18 17:00 | Maximilian Kaiser v Boris Kozlov | 6-3,1-6,6-3 |
| ITF Germany F9 | 2016/07/31 08:00 | Maximilian Kaiser v Yannick Stephan Born | 3-6,2-6 |
| ITF Czech Republic F2 Qual | 2016/05/15 10:00 | Maximilian Kaiser v Filip Duda | 3-6,3-6 |
| ITF Egypt F33 | 2015/11/01 11:30 | Maximilian Kaiser v Dmytro Ishtuganov | 6-7,6-4,3-6 |