Stadium: Center Court Round: 14 Ground: Clay
| Polish National Tour | 2020/06/18 11:00 | Wojciech Marek v Daniel Michalski | 3-6,3-6 |
| ITF Poland F5 | 2017/07/10 11:35 | Daniel Michalski v Wojciech Marek | 6-1,7-6 |
| ITF M15 Lodz | 2021/08/20 08:00 | Yann Wojcik v Wojciech Marek | 7-6,6-3 |
| ITF M15 Lodz | 2021/08/19 07:55 | Wojciech Marek v Markus Eriksson | 6-4,7-5 |
| ITF M15 Lodz | 2021/08/18 11:25 | Wojciech Marek v Olaf Pieczkowski | 5-7,6-4,6-1 |
| ITF M15 Gdynia | 2021/08/12 08:00 | Alejo Lorenzo Lingua Lavallen v Wojciech Marek | 3-6,6-3,6-3 |
| ITF M15 Gdynia | 2021/08/10 14:30 | Wojciech Marek v Georgii Kravchenko | 6-4,6-2 |
| Challenger Poznan | 2021/07/25 11:00 | Joao Domingues v Wojciech Marek | 6-3,6-0 |
| Polish National Tour | 2021/07/13 10:35 | Piotr Matuszewski v Wojciech Marek | 6-4,6-3 |
| ITF M25 Wroclaw | 2021/06/29 14:20 | Alessandro Bega v Wojciech Marek | 6-2,6-4 |
| ITF M15 Lodz | 2021/08/20 10:15 | Daniel Michalski v Gilbert S K Junior | 6-4,3-6,3-6 |
| ITF M15 Lodz | 2021/08/19 10:30 | Daniel Michalski v Szymon Kielan | 3-6,7-5,6-3 |
| ITF M15 Lodz | 2021/08/18 11:40 | Daniel Michalski v Piotr Grynkowski | 6-1,6-1 |
| ITF M15 Gdynia | 2021/08/13 12:00 | Daniel Michalski v Fabian Marozsan | 4-6,3-6 |
| ITF M15 Gdynia | 2021/08/12 10:30 | Daniel Michalski v Michal Dembek | 7-6,4-6,6-3 |
| ITF M15 Gdynia | 2021/08/11 12:40 | Daniel Michalski v Igor Marcondes | 6-2,6-3 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 13:10 | Adam Pavlasek v Daniel Michalski | 7-5,6-4 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 07:00 | Aleksander Orlikowski v Daniel Michalski | 2-6,1-6 |