Stadium: Court 1 Round: 27 Ground: Clay
| 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 Wroclaw | 2023/06/29 08:00 | Matthew William Donald v Sergey Fomin | 2-6,6-4,2-6 |
| ITF M15 Vienna | 2023/08/31 09:50 | Lukas Palovic v Peter Heller | 3-6,1-6 |
| ITF M15 Vienna | 2023/08/30 08:00 | Alessandro Ragazzi v Peter Heller | 1-6,6-7 |
| ITF M15 Ueberlingen | 2023/08/17 10:05 | Jakob Schnaitter v Peter Heller | 1-6,7-5,6-4 |
| ITF M15 Ueberlingen | 2023/08/16 16:00 | Filippo Speziali v Peter Heller | 2-6,3-6 |
| ITF M15 Eupen | 2023/08/12 12:15 | Peter Heller v Marc Majdandzic | 5-7,1-6 |
| ITF M15 Eupen | 2023/08/11 09:00 | Cesar Bouchelaghem v Peter Heller | 2-6,0-6 |
| ITF M15 Eupen | 2023/08/10 09:00 | Abel Forger v Peter Heller | 2-6,3-6 |
| ITF M15 Eupen | 2023/08/09 13:00 | Brian Bozemoj v Peter Heller | 4-6,1-6 |