| Challenger Ochsenhausen | 03/15 18:30 | - | Diogo Carvalho v Mateusz Zalewski | L | 3-2 | |
| Challenger Ochsenhausen | 03/15 17:30 | - | Tomasz Tomaszuk v Mateusz Zalewski | L | 3-1 | |
| Oman Open U21 Women | 01/27 10:00 | - | Mateusz Zalewski v Thibault Poret | L | 0-4 | |
| Challenger Ochsenhausen | 11/19 16:09 | - | Jan Zandecki v Mateusz Zalewski | L | 3-0 | |
| Challenger Ochsenhausen | 10/29 15:40 | - | Damian Wederlich v Mateusz Zalewski | L | 3-1 | |
| Challenger Ochsenhausen | 09/05 15:20 | - | Milosz Redzimski v Mateusz Zalewski | L | 3-1 | |
| Euro Youth Champs Teams | 07/17 12:40 | - | Thibault Poret v Mateusz Zalewski | L | 3-0 | |
| Euro Youth Champs Teams | 07/17 11:21 | - | Flavien Coton v Mateusz Zalewski | W | 2-3 | |
| Challenger Ochsenhausen | 10/21 16:05 | - | SHiyu Sun v Mateusz Zalewski | L | 3-0 | |
| Challenger Ochsenhausen | 10/14 16:40 | - | Szymon Malicki v Mateusz Zalewski | W | 2-3 | |
| Poland First league | 12/05 12:00 | - | Maciej Kucharski v Mateusz Zalewski | W | 2-3 | |
| Poland First league | 12/05 11:04 | - | Adam Dudzicz v Mateusz Zalewski | W | 2-3 |