| ITF Poland F4 | 2018/05/22 08:55 | Pawel Juszczak v Piotr Grynkowski | 6-2,6-3 |
| ITF M15 Trnava | 2020/02/26 12:50 | Piotr Grynkowski v Jan Satral | 4-6,2-6 |
| ITF M15 Trnava | 2020/02/25 09:00 | Isa Mammetgulyyev v Piotr Grynkowski | 3-6,2-6 |
| ITF M15 Trnava | 2020/02/24 14:00 | Jiri Barnat v Piotr Grynkowski | 3-6,2-6 |
| ITF M15 Sharm El Sheikh | 2020/02/19 15:40 | Issei Okamura v Piotr Grynkowski | 6-3,7-5 |
| ITF M15 Sharm El Sheikh | 2020/02/18 09:30 | Piotr Grynkowski v Iancu-Iustinian Ghinda | 6-2,6-3 |
| ITF M15 Sharm El Sheikh | 2020/02/17 09:00 | Piotr Grynkowski v Ken Onishi | 6-1,6-4 |
| ITF M15 Sharm El Sheikh | 2020/02/12 08:00 | Pablo Vivero Gonzalez v Piotr Grynkowski | 6-3,6-3 |
| ITF M15 Sharm El Sheikh | 2020/02/11 08:00 | Volodymyr Uzhylovskyi v Piotr Grynkowski | 6-4,6-4 |
| ITF M15 Porec | 2020/03/12 09:00 | Vit Kopriva v Pawel Juszczak | 6-4,6-1 |
| ITF M15 Porec | 2020/03/11 10:40 | Pawel Juszczak v Colin Sinclair | 6-2,6-4 |
| ITF M15 Porec | 2020/03/10 08:55 | Pawel Juszczak v Gorazd Srbljak | 6-4,6-2 |
| ITF M15 Porec | 2020/03/09 09:00 | Pawel Juszczak v Kalin Ivanovski | 1-6,6-3,10-3 |
| ITF M15 Porec | 2020/03/08 10:15 | Pawel Juszczak v Gaspar Zimbrek-Turkovic | 6-0,6-1 |
| ITF M15 Manacor | 2020/01/14 09:00 | Pawel Juszczak v Alessandro Coppini | 2-6,5-7 |
| ITF M15 Manacor | 2020/01/13 10:30 | Pawel Juszczak v Jake Hersey | 4-6,6-1,10-8 |
| ITF M15 Manacor | 2020/01/12 11:30 | Pawel Juszczak v Oriol Fillat Gimenez | 7-5,6-4 |