Stadium: Court 1 Round: 25 Ground: Clay
| ITF M15 Lodz | 2021/08/18 11:40 | Daniel Michalski v Piotr Grynkowski | 6-1,6-1 |
| Polish National Tour | 2020/07/26 09:50 | Piotr Grynkowski v Daniel Michalski | 4-6,3-6 |
| ITF M15 Antalya | 2021/11/28 13:45 | Cezar Cretu v Daniel Michalski | 6-7,2-6 |
| ITF M15 Antalya | 2021/11/28 10:50 | Lucas Gerch v Daniel Michalski | 5-7,0-6 |
| ITF M15 Antalya | 2021/11/26 07:30 | Marsel Ilhan v Daniel Michalski | 5-7,1-6 |
| ITF M15 Antalya | 2021/11/25 07:50 | Maik Steiner v Daniel Michalski | 3-6,1-6 |
| ITF M15 Antalya | 2021/11/24 09:15 | Ezequiel Simonit v Daniel Michalski | 1-6,3-6 |
| ITF M15 Antalya | 2021/11/21 07:00 | Daniel Michalski v Billy Harris | 2-6,6-1,6-3 |
| ITF M15 Antalya | 2021/11/20 07:00 | Bogdan Ionut Apostol v Daniel Michalski | 6-7,1-6 |
| ITF M15 Antalya | 2021/11/19 06:15 | Daniel Michalski v Mircea-Alexandru Jecan | 6-3,6-0 |
| ITF M15 Cairo | 2022/01/06 08:00 | Piotr Grynkowski v Simone Roncalli | 4-6,1-6 |
| ITF M15 Cairo | 2022/01/05 07:30 | Piotr Grynkowski v Preston Brown | 5-7,6-4,6-2 |
| ITF M15 Monastir | 2021/12/07 08:00 | Piotr Grynkowski v Andrew Paulson | 3-6,3-6 |
| ITF M15 Lodz | 2021/08/18 11:40 | Daniel Michalski v Piotr Grynkowski | 6-1,6-1 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/03 09:00 | Piotr Grynkowski v Pawel Juszczak | 2-6,2-6 |
| ITF M25 Wroclaw | 2021/06/28 11:00 | Piotr Grynkowski v Maciej Rajski | 6-7,4-6 |
| ITF M25 Wroclaw | 2021/06/27 15:30 | Luca Castelnuovo v Piotr Grynkowski | 6-4,6-7,7-10 |
| ITF M15 Tbilisi | 2021/05/17 06:00 | Piotr Grynkowski v Christian Sigsgaard | 3-6,3-6 |