Stadium: Court 10 Round: 25 Ground: Clay
| 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 Novomoskovsk | 2021/06/03 19:20 | Wojciech Marek v Oleksii Krutykh | 0-6,5-7 |
| ITF M15 Novomoskovsk | 2021/05/27 07:50 | Wojciech Marek v Oleksii Krutykh | 0-6,3-6 |
| ITF M15 Novomoskovsk | 2021/05/26 13:05 | Oleg Prihodko v Wojciech Marek | 4-6,7-6,3-6 |
| ITF M15 Gdynia | 2021/08/11 15:40 | Pol Toledo Bague v Olaf Pieczkowski | 6-4,6-0 |
| ITF M15 Gdynia | 2021/08/10 08:00 | Alexander Kotzen v Olaf Pieczkowski | 2-6,6-2,8-10 |
| ITF M15 Gdynia | 2021/08/09 08:00 | Olaf Pieczkowski v Millen Hurrion | 6-1,6-7,10-4 |
| ITF M15 Gdynia | 2021/08/08 08:00 | Olaf Pieczkowski v Dominik Langmajer | 6-2,6-1 |
| ITF M25 Wroclaw | 2021/06/28 09:30 | Alibek Kachmazov v Olaf Pieczkowski | 6-0,6-1 |
| ITF M25 Wroclaw | 2021/06/27 11:00 | Tomas Lanik v Olaf Pieczkowski | 2-6,3-6 |
| Polish National Tour | 2020/07/15 10:55 | Olaf Pieczkowski v Daniel Michalski | 2-6,3-6 |