Stadium: Center Court Round: 44 Ground: Clay
| ITF M25 Bielsko Biala | 2023/08/14 09:00 | Piotr Galus v Juliusz Bienkiewicz | 3-6,0-6 |
| ITF M25 Lodz | 2023/08/08 10:35 | Matyas Cerny v Juliusz Bienkiewicz | 6-0,6-1 |
| ITF M25 Lodz | 2023/08/08 07:30 | Juliusz Bienkiewicz v Piotr Pawlak | 6-4,6-1 |
| ITF M25 Lodz | 2023/08/07 10:30 | Michalis Sakellaridis v Juliusz Bienkiewicz | 6-7,1-6 |
| ITF M15 Wroclaw | 2023/06/26 08:00 | Juliusz Bienkiewicz v Peter Nad | 5-7,4-6 |
| ITF M15 Wroclaw | 2023/06/25 08:00 | Romain Faucon v Juliusz Bienkiewicz | 6-2,2-6,7-10 |
| ITF M15 Antalya | 2023/04/03 08:15 | Takuya Kumasaka v Juliusz Bienkiewicz | 6-1,6-1 |
| ITF M15 Antalya | 2023/04/02 07:00 | Juliusz Bienkiewicz v Lucas Obeid | 6-2,6-3 |
| ITF M25 Bielsko Biala | 2023/08/14 09:00 | Richard Antoni v Gabriel Matuszewski | 4-6,3-6 |
| ITF M25 Lodz | 2023/08/08 07:30 | Piotr Siekanowicz v Gabriel Matuszewski | 1-6,7-6,10-6 |
| ITF M25 Lodz | 2023/08/07 10:30 | Dawid Wisniewski v Gabriel Matuszewski | 1-6,4-6 |
| ITF M15 Eindhoven | 2023/07/30 10:30 | Brian Bozemoj v Gabriel Matuszewski | 6-2,4-6,10-8 |
| ITF M15 Vejle | 2023/07/25 07:00 | Jack Karlsson Winstrand v Gabriel Matuszewski | 6-2,6-4 |
| ITF M15 Vejle | 2023/07/24 07:00 | Pierre Gimla v Gabriel Matuszewski | 0-6,0-6 |
| ITF M25 Roehampton | 2023/07/16 10:40 | Sean Hodkin v Gabriel Matuszewski | 6-4,6-2 |
| ITF M25 Marburg | 2023/07/04 10:05 | Dominik Recek v Gabriel Matuszewski | 6-2,6-1 |