Stadium: Court 5 Round: 25 Ground: Clay
| ITF M15 - Koszalin | 2023/09/05 10:40 | Mikolaj Lis v Michal Matuszewski | 6-0,7-5 |
| ITF M15 - Koszalin | 2023/09/04 12:00 | Mikolaj Lis v William Rejchtman Vinciguerra | 4-6,6-3,10-5 |
| ITF - M15 Szczawno | 2023/08/28 10:00 | Mikolaj Lis v Maciej Matuszczyk | 6-4,3-6,8-10 |
| 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 - Lodz | 2023/08/07 13:30 | Maciej Matuszczyk v Mikolaj Lis | 6-1,7-6 |
| ITF M25 - Lodz | 2023/08/07 07:30 | Edoardo Cherie Ligniere v Mikolaj Lis | 1-6,3-6 |
| ITF - M15 Szczawno | 2023/08/30 17:05 | Maciej Rajski v Mateusz Terczynski | 6-2,6-7,6-1 |
| ITF - M15 Szczawno | 2023/08/29 10:35 | Mateusz Terczynski v Ivan Kremenchutskyi | 6-3,7-5 |
| ITF - M15 Szczawno | 2023/08/28 10:00 | Mateusz Terczynski v Michalis Sakellaridis | 6-3,6-4 |
| ITF - M25 Poznan | 2023/08/21 09:00 | Mateusz Terczynski v Juliusz Bienkiewicz | 6-3,3-6,5-10 |
| ITF - M25 Bielsko Biala | 2023/08/17 08:30 | Mateusz Terczynski v Jiri Barnat | 4-6,7-6,4-6 |
| ITF - M25 Bielsko Biala | 2023/08/15 11:30 | Mateusz Terczynski v Mikolaj Migdalski | 2-6,6-3,6-1 |
| ITF - M25 Bielsko Biala | 2023/08/14 12:00 | Mateusz Terczynski v Stephanos Schinas | 5-7,2-6 |
| ITF - M25 Bielsko Biala | 2023/08/14 07:30 | Mateusz Terczynski v Filip Kana | 6-2,6-1 |