| ITF M15 Vienna | 2023/09/01 08:00 | Matthew William Donald v Peter Heller | 2-6,3-6 |
| ITF M15 Vienna | 2023/08/31 12:05 | Matthew William Donald v Tomas Lanik | 6-4,6-4 |
| ITF M15 Ueberlingen | 2023/08/16 08:00 | Matthew William Donald v Aleksandre Metreveli | 6-4,1-6,4-6 |
| ITF M15 Frankfurt Am Main | 2023/08/08 09:00 | Kai Lemstra v Matthew William Donald | 6-3,6-1 |
| ITF M15 Monastir | 2023/07/28 08:30 | Kris Van Wyk v Matthew William Donald | 6-1,6-4 |
| ITF M15 Monastir | 2023/07/27 10:25 | Matthew William Donald v Dylan Salton | 6-1,6-1 |
| ITF M15 Monastir | 2023/07/26 10:00 | Matthew William Donald v Gabriele Bosio | 4-6,6-2,6-3 |
| ITF M15 Monastir | 2023/07/18 10:20 | Kody Pearson v Matthew William Donald | 6-1,6-2 |
| ITF M15 Koszalin | 2023/09/06 09:40 | Mikolaj Lis v Mateusz Terczynski | 1-6,3-6 |
| 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 |