Stadium: Court 3 Round: 54 Ground: Clay
| ITF - Bratysława M15 | 2021/03/03 16:55 | Piotr Grynkowski v Daniel Siniakov | 3-6,6-3,1-6 |
| ITF - Bratysława M15 | 2021/03/02 09:00 | Piotr Grynkowski v Mate Voros | 6-2,6-3 |
| ITF - Bratysława M15 | 2021/03/01 12:00 | Piotr Grynkowski v Jakub Katuch | 6-3,6-1 |
| ITF - Cairo M15 | 2021/01/10 07:00 | Piotr Grynkowski v Francesco Passaro | 5-7,1-6 |
| ITF - Cairo M15 | 2021/01/08 08:00 | Maxence Beauge v Piotr Grynkowski | 6-3,1-6,6-1 |
| ITF - Cairo M15 | 2021/01/07 08:00 | Piotr Grynkowski v Lorenzo Bocchi | 1-6,6-4,6-3 |
| ITF - Cairo M15 | 2021/01/06 08:00 | Alejo Lorenzo Lingua Lavallen v Piotr Grynkowski | 6-4,5-7,5-7 |
| ITF - Cairo M15 | 2021/01/04 12:00 | Piotr Grynkowski v Muthu A Senthilkumar | 6-3,6-1 |
| ITF Slovakia F1 | 2018/07/21 11:00 | Matthew Kandath v Tomas Balazi | 6-4,6-4 |
| ITF Czech Republic F4 Qual | 2018/06/23 08:00 | Tomas Balazi v Samm Butler | 3-6,4-6 |
| ITF Slovakia F1 | 2017/07/23 11:00 | Tomas Balazi v Gabriel Schmidt | 2-6,3-6 |