Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Zilina | 2021/09/02 07:55 | Wojciech Marek v Mariano Navone | 7-5,5-7,6-7 |
| ITF M15 Zilina | 2021/09/01 09:20 | Wojciech Marek v Andrej Krajcik | 6-0,6-3 |
| Challenger Warszawa | 2021/08/22 09:00 | Wojciech Marek v Daniel Michalski | 6-7,1-6 |
| 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 |
| ITF M15 Monastir | 2021/09/28 08:00 | Daisuke Sumizawa v Taketo Takamisawa | 6-1,6-1 |
| ITF M15 Monastir | 2021/09/27 08:00 | Daisuke Sumizawa v Josh Reid | 3-6,6-1,10-7 |
| ITF M15 Monastir | 2021/09/21 08:00 | Daisuke Sumizawa v Natthasith Kunsuwan | 6-2,3-6,7-10 |
| ITF M15 Ulcinj | 2021/09/15 13:15 | Daisuke Sumizawa v Juan Pablo Paz | 4-6,2-6 |
| ITF M15 Ulcinj | 2021/09/13 13:00 | Daisuke Sumizawa v Deney Wassermann | 6-4,7-6 |
| ITF M15 Ulcinj | 2021/09/13 08:00 | Daisuke Sumizawa v Nicolo Inserra | 6-4,6-0 |
| ITF M15 Ulcinj | 2021/09/09 12:15 | Daisuke Sumizawa v Bastian Malla | 6-4,1-6,0-6 |
| ITF M15 Ulcinj | 2021/09/06 13:00 | Daisuke Sumizawa v Alessandro Procopio | 6-2,6-2 |