| ETTU European Individual Champs | 2024/10/15 09:35 | Mateusz Zalewski v Hilal Hasanov | W | 3-0 |
| Challenger Ochsenhausen | 2024/03/15 18:30 | Diogo Carvalho v Mateusz Zalewski | L | 3-2 |
| Challenger Ochsenhausen | 2024/03/15 17:30 | Tomasz Tomaszuk v Mateusz Zalewski | L | 3-1 |
| Oman Open U21 Women | 2024/01/27 10:00 | Mateusz Zalewski v Thibault Poret | L | 0-4 |
| Challenger Ochsenhausen | 2023/11/19 16:09 | Jan Zandecki v Mateusz Zalewski | L | 3-0 |
| Challenger Ochsenhausen | 2023/10/29 15:40 | Damian Wederlich v Mateusz Zalewski | L | 3-1 |
| Challenger Ochsenhausen | 2023/09/05 15:20 | Milosz Redzimski v Mateusz Zalewski | L | 3-1 |
| Euro Youth Champs Teams | 2023/07/17 12:40 | Thibault Poret v Mateusz Zalewski | L | 3-0 |
| European Team Championships | 2023/05/05 08:00 | Lukas Rimkus v Jakub Dyjas | L | 0-3 |