| ITF Poland F3 | 2018/05/16 08:00 | Wojciech Marek v Piotr Matuszewski | 6-2,4-6,6-1 |
| ITF M15 Monastir | 2021/04/05 09:00 | Igor Marcondes v Piotr Matuszewski | 7-6,6-3 |
| ITF M15 Monastir | 2021/04/04 10:30 | Miguel Fernando Pereira v Piotr Matuszewski | 3-6,3-6 |
| ITF M15 Sharm El Sheikh | 2021/02/07 11:00 | Piotr Matuszewski v Lorenzo Rottoli | 4-6,0-6 |
| ITF M15 Sharm El Sheikh | 2021/01/31 09:00 | Daisuke Sumizawa v Piotr Matuszewski | 4-6,6-1,10-8 |
| ITF M15 Cairo | 2021/01/26 08:00 | Naoki Tajima v Piotr Matuszewski | 6-4,6-4 |
| ITF M15 Cairo | 2021/01/26 08:00 | Naoki Tajima v Piotr Matuszewski | 6-4,6-4 |
| ITF M15 Cairo | 2021/01/25 08:00 | Piotr Matuszewski v Aryan Goveas | 7-6,6-2 |
| ITF M15 Cairo | 2021/01/19 08:00 | Franco Agamenone v Piotr Matuszewski | 6-2,6-1 |
| Davis Cup | 2021/03/06 11:20 | Wojciech Marek v Marcelo Arevalo | 4-6,2-6 |
| ITF M15 Nur-Sultan | 2021/02/10 03:55 | Wojciech Marek v Enrico Dalla Valle | 4-6,2-6 |
| ITF M15 Nur-Sultan | 2021/02/05 06:00 | Wojciech Marek v Michal Dembek | 1-6,4-6 |
| ITF M15 Nur-Sultan | 2021/02/04 06:30 | Aleksei Khomich v Wojciech Marek | 3-6,4-6 |
| ITF M15 Nur-Sultan | 2021/02/03 09:40 | Marco Brugnerotto v Wojciech Marek | 7-5,3-6,1-6 |
| ITF M15 Monastir | 2021/01/13 12:15 | Wojciech Marek v Antonio Campo | 6-0,6-3 |
| ITF M15 Monastir | 2021/01/09 08:30 | Wojciech Marek v Eric Vanshelboim | 4-6,7-5,6-7 |
| ITF M15 Monastir | 2021/01/07 11:05 | Wojciech Marek v Robin Bertrand | 6-4,6-4 |