Estadio: Court 3 Round: 44 Ground: Clay
| ITF M25 Lódz | 2023/08/07 13:30 | Maciej Matuszczyk v Mikolaj Lis | 6-1,7-6 |
| ITF M25 Bielsko-Biala | 2023/08/16 12:40 | Mikolaj Lis v Stephanos Schinas | 6-3,4-6,6-7 |
| ITF M25 Bielsko-Biala | 2023/08/14 16:15 | Mikolaj Lis v Norbert Marosik | 6-2,7-6 |
| ITF M25 Bielsko-Biala | 2023/08/14 10:30 | Mikolaj Lis v Martins Rocens | 6-7,6-4,11-9 |
| ITF M25 Lódz | 2023/08/07 13:30 | Maciej Matuszczyk v Mikolaj Lis | 6-1,7-6 |
| ITF M25 Lódz | 2023/08/07 07:30 | Edoardo Cherie Ligniere v Mikolaj Lis | 1-6,3-6 |
| ITF M15 Wroclaw | 2023/06/26 09:00 | Mikolaj Lis v Marc Antoine Gaillard | 3-6,1-6 |
| ITF M15 Nyíregyháza | 2023/06/05 09:30 | Petro Orlando Fellin v Mikolaj Lis | 6-3,6-0 |
| ITF M25 Jablonec Nad Nisou | 2023/05/28 13:00 | Mikolaj Lis v Jonas P Hartenstein | 1-6,2-6 |
| ITF M25 Poznan | 2023/08/20 12:00 | Michal Matuszewski v Maciej Matuszczyk | 6-3,7-5 |
| ITF M25 Bielsko-Biala | 2023/08/13 11:00 | Maciej Matuszczyk v Andrea Meduri | 2-6,7-5,7-10 |
| ITF M25 Lódz | 2023/08/09 08:00 | Iiro Vasa v Maciej Matuszczyk | 6-3,6-1 |
| ITF M25 Lódz | 2023/08/08 09:00 | Francesco Ferrari v Maciej Matuszczyk | 6-1,6-7,10-12 |
| ITF M25 Lódz | 2023/08/07 13:30 | Maciej Matuszczyk v Mikolaj Lis | 6-1,7-6 |
| ITF M25 Lódz | 2023/08/07 07:30 | Maciej Matuszczyk v Mateusz Kulakowski | 3-6,6-3,10-7 |