Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/10/07 11:55 | Wojciech Marek v Wissam Abderrahman | 6-2,6-4 |
| ITF M15 Monastir | 2021/10/06 12:15 | Wojciech Marek v Viktor Jovic | 7-6,6-4 |
| ITF M15 Monastir | 2021/09/29 10:40 | Wojciech Marek v Daisuke Sumizawa | 3-6,4-6 |
| 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 Warsaw | 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 Monastir | 2021/10/07 10:30 | Niki Kaliyanda Poonacha v Guy Den Ouden | 0-6,3-6 |
| ITF M15 Monastir | 2021/10/06 11:50 | Nikita Volonski v Guy Den Ouden | 7-5,2-6,1-6 |
| ITF M15 Monastir | 2021/10/02 08:30 | Ugo Blanchet v Guy Den Ouden | 6-4,6-3 |
| ITF M15 Monastir | 2021/10/01 08:00 | Ryota Tanuma v Guy Den Ouden | 5-7,3-6 |
| ITF M15 Monastir | 2021/09/30 08:00 | Guy Den Ouden v Lukas Neumayer | 7-6,6-3 |
| ITF M15 Monastir | 2021/09/29 10:45 | Guy Den Ouden v Mohamed Amine Aissa Khelifa | 6-0,6-3 |
| ITF M15 Monastir | 2021/09/22 08:00 | Guy Den Ouden v Ryota Tanuma | 6-7,2-6 |
| ITF M15 Allershausen | 2021/09/05 11:00 | Guy Den Ouden v Mick Veldheer | 6-0,6-4 |