Stadium: Court 1 Round: 26 Ground: Clay
| 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 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 Lodz | 2021/08/17 08:00 | Karlis Ozolins v Markus Eriksson | 6-7,6-1,2-6 |
| ITF M15 Gdynia | 2021/08/11 08:00 | Daniel De Jonge v Markus Eriksson | 6-4,6-1 |
| ITF M15 Frederiksberg | 2021/08/08 10:00 | Markus Eriksson v Jonathan Mridha | 3-6,6-7 |
| ITF M15 Frederiksberg | 2021/08/07 11:05 | Markus Eriksson v August Holmgren | 6-3,3-6,6-4 |
| ITF M15 Frederiksberg | 2021/08/06 10:50 | Markus Eriksson v Vasil Kirkov | 6-4,6-3 |
| ITF M15 Frederiksberg | 2021/08/05 10:20 | Markus Eriksson v Nikola Slavic | 6-3,6-1 |
| ITF M15 Frederiksberg | 2021/08/03 13:05 | Markus Eriksson v George Loffhagen | 6-7,6-2,6-2 |
| Challenger Tampere | 2021/07/18 08:00 | Bogdan Bobrov v Markus Eriksson | 7-6,6-4 |