| ITF M15 Bol | 05/20 10:35 | 62 | David Schwarc v Matuszewski, Gabriel | 7-6,6-3 | |
| ITF M15 Prijedor | 05/14 14:00 | 44 | Tymur Bieldiugin v Matuszewski, Gabriel | 7-6,6-0 | |
| ITF M15 Prijedor | 05/13 12:00 | 44 | 허우, 잉 v Matuszewski, Gabriel | 2-6,2-6 | |
| ITF M15 Antalya | 04/28 07:00 | 62 | Matuszewski, Gabriel v Maximilian Figl | 7-5,3-6,5-10 | |
| ITF M15 Antalya | 04/21 07:00 | 62 | Matuszewski, Gabriel v Dinko Dinev | 6-4,5-7,3-10 | |
| ITF M15 Antalya | 04/14 07:00 | 62 | Matuszewski, Gabriel v Kanan Gasimov | 6-7,2-6 | |
| ITF M15 Antalya | 04/08 07:00 | 62 | 마자, 마누엘 v Matuszewski, Gabriel | 6-1,6-4 | |
| ITF M15 Antalya | 04/01 09:50 | 62 | Maxim Zhukov v Matuszewski, Gabriel | 7-5,7-6 | |
| ITF M15 Antalya | 03/31 07:00 | 62 | Matuszewski, Gabriel v Grekul, Alexander | Retired | |
| ITF M15 Antalya | 03/24 07:00 | 62 | Matuszewski, Gabriel v 바사, 에로 | 4-6,3-6 | |
| ITF M15 Antalya | 03/18 10:30 | 62 | Sergio Badini v Matuszewski, Gabriel | 6-1,6-3 | |
| ITF M15 Antalya | 03/17 07:00 | 62 | Matuszewski, Gabriel v 알카야, 멜트 | Retired | |
| ITF M15 Antalya | 03/12 09:10 | 62 | Matuszewski, Gabriel v 마르티네즈, 로우로이 | 2-6,2-6 | |
| ITF M15 Antalya | 03/11 10:55 | 62 | 일란, 마르셀 v Matuszewski, Gabriel | 6-2,4-6,7-10 | |
| ITF M15 Antalya | 03/10 07:00 | 62 | Matuszewski, Gabriel v Janis Graski | 6-1,1-6,10-4 | |
| ITF M15 Antalya | 03/04 09:40 | 62 | Matuszewski, Gabriel v Genov, Anthony | 2-6,3-6 | |
| ITF M15 Antalya | 03/03 07:00 | 62 | Matuszewski, Gabriel v 브레시아니, 로렌조 | Retired | |
| ITF M15 Antalya | 02/27 06:30 | 62 | Matuszewski, Gabriel v 피오렌티니, 안드레아 | 2-6,3-6 | |
| ITF M15 Antalya | 02/25 07:00 | 62 | Matuszewski, Gabriel v Tobias Smoliner | 6-1,6-1 | |
| ITF M25 Antalya | 02/19 07:00 | 62 | Matuszewski, Gabriel v 바탈진, 로렌스 | 4-6,2-6 | |
| ITF M25 Antalya | 02/18 07:00 | 62 | 안들제자크, 바틀로미에 v Matuszewski, Gabriel | 4-6,2-6 | |
| ITF M25 Antalya | 02/12 10:35 | 62 | Attila Boros v Matuszewski, Gabriel | 6-3,6-4 | |
| ITF M25 Antalya | 02/11 07:00 | 62 | Matuszewski, Gabriel v Salton, Dylan | 6-4,6-4 | |
| ITF M25 Antalya | 02/05 06:55 | 62 | Polukhin, Savva v Matuszewski, Gabriel | 6-1,6-0 | |
| ITF M25 Antalya | 02/04 07:00 | 62 | Jan Facek v Matuszewski, Gabriel | 2-6,2-6 | |
| ITF M25 Antalya | 01/29 08:45 | 62 | Haydar C Gokpinar v Matuszewski, Gabriel | 6-3,6-2 | |
| ITF M25 Antalya | 01/28 07:00 | 62 | Dmitrii Vasilev v Matuszewski, Gabriel | 6-7,6-7 | |
| ITF M15 Antalya | 01/15 11:00 | 62 | Matuszewski, Gabriel v Daniele Minighini | 0-6,3-6 | |
| ITF M15 Antalya | 01/08 11:00 | 62 | 토파닌, 니콜로 v Matuszewski, Gabriel | 6-2,6-1 | |
| ITF M15 Antalya | 01/07 06:30 | 62 | Ruenger, Roman v Matuszewski, Gabriel | 4-6,3-6 |