Stadium: Court 3 Round: 25 Ground: Clay
| 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 - Cairo M15 | 2021/01/04 09:00 | Piotr Grynkowski v Stevan Popovic | 6-1,6-0 |
| ITF - Bratysława M15 | 2021/03/02 09:00 | Peter Makk v Daniel Siniakov | 6-2,6-7,5-10 |
| ITF - Bratysława M15 | 2021/03/01 09:00 | Daniel Siniakov v Philip Bachmaier | 6-2,7-6 |
| ITF - Pardubice M25 | 2020/09/27 09:00 | Matic Spec v Daniel Siniakov | 1-6,6-2,13-11 |
| ITF - Praga M25 | 2020/09/13 09:00 | Wojciech Marek v Daniel Siniakov | 6-0,6-4 |
| ITF - Milovice M15 | 2019/11/12 12:25 | Daniel Siniakov v Jakob Aichhorn | 6-7,0-6 |
| ITF M15 Prague | 2019/11/07 10:55 | Daniel Siniakov v Oleksii Krutykh | 6-7,2-6 |
| ITF M15 Prague | 2019/11/06 15:15 | Dominik Boehler v Daniel Siniakov | 6-3,5-7,6-7 |
| ITF M15 Prague | 2019/11/05 10:15 | Daniel Siniakov v Federico Arnaboldi | 6-4,6-1 |