Stadium: Central Court
| ITF Poland F6 | 2018/08/07 08:00 | Piotr Matuszewski v Kamil Gajewski | 6-3,4-6,6-4 |
| Marbello Cup Exhibition Series | 2020/06/10 14:30 | Michal Mikula v Kamil Gajewski | 6-1,6-2 |
| Marbello Cup Exhibition Series | 2020/06/10 08:20 | Kamil Gajewski v Filip Kolasinski | 4-6,2-6 |
| Marbello Cup Exhibition Series | 2020/06/09 15:50 | Michal Wozniak v Kamil Gajewski | 6-1,3-6,5-10 |
| Marbello Cup Exhibition Series | 2020/06/09 10:25 | Jan Galka v Kamil Gajewski | 7-5,6-4 |
| Marbello Cup Exhibition Series | 2020/05/09 10:20 | Kamil Gajewski v Makary Adamek | 6-2,6-1 |
| Marbello Cup Exhibition Series | 2020/05/08 08:00 | Kamil Gajewski v Makary Adamek | 6-4,6-3 |
| Marbello Cup Exhibition Series | 2020/05/07 13:50 | Kamil Gajewski v Mateusz Terczynski | 6-2,6-7,7-5 |
| Marbello Cup Exhibition Series | 2020/05/07 10:20 | Adam Mlazga v Kamil Gajewski | 4-6,1-6 |
| ITF M15 Trnava | 2020/02/24 14:00 | Kai Lemstra v Piotr Matuszewski | 6-2,6-0 |
| ITF M15 Sharm El Sheikh | 2020/02/19 14:10 | Vaughn Hunter v Piotr Matuszewski | 6-1,6-4 |
| ITF M15 Sharm El Sheikh | 2020/02/18 08:00 | Moerani Bouzige v Piotr Matuszewski | 2-6,7-6,8-10 |
| ITF M15 Sharm El Sheikh | 2020/02/17 10:00 | Nemanja Malesevic v Piotr Matuszewski | 4-6,4-6 |
| ITF M15 Sharm El Sheikh | 2020/02/11 08:00 | Oleksandr Ovcharenko v Piotr Matuszewski | 6-3,6-3 |
| ITF M15 Sharm El Sheikh | 2020/02/10 08:00 | Adam Bronka v Piotr Matuszewski | 2-6,2-6 |
| ITF M15 Sharm El Sheikh | 2020/02/09 08:00 | Piotr Matuszewski v Niklas Johansson | 6-3,6-4 |
| ITF M15 Cairo | 2019/11/27 10:35 | Daniel Michalski v Piotr Matuszewski | 6-1,6-3 |