Stadium: Court 4 Round: 1
| Polish National Tour | 2020/07/07 12:10 | Dembek, Michal v Piotr Grynkowski | 7-6,6-1 |
| Polish National Tour | 2020/06/23 10:00 | Piotr Grynkowski v Pawel Juszczak | 5-7,3-6 |
| Polish National Tour | 2020/06/22 07:00 | Piotr Grynkowski v Gajewski, Kamil | 6-3,6-3 |
| Polish National Tour | 2020/06/21 09:30 | Piotr Grynkowski v Walkow, Szymon | 5-7,6-3,7-6 |
| Polish National Tour | 2020/06/17 07:00 | Piotr Grynkowski v Orlikowski, Aleksander | 7-5,6-1 |
| Trnava, Singles Main, M-ITF-SVK-03A | 2020/02/26 12:50 | Piotr Grynkowski v Satral, Jan | 4-6,2-6 |
| Trnava, Singles Main, M-ITF-SVK-03A | 2020/02/25 09:00 | Mammetgulyyev, Isa v Piotr Grynkowski | 3-6,2-6 |
| Trnava, Singles Main, M-ITF-SVK-03A | 2020/02/24 14:00 | Jiri Barnat v Piotr Grynkowski | 3-6,2-6 |