Stadium: Displaymax Court Round: 27 Ground: Clay
| ITF M15 Uberlingen | 2023/08/17 10:50 | Lasse Poertner v Illya Beloborodko | 6-4,3-6,6-3 |
| ITF M15 Frankfurt Am Main | 2023/08/08 09:00 | Lasse Poertner v Florian Broska | 5-7,1-6 |
| ITF M15 Eindhoven | 2023/08/01 09:55 | Elmer Moller v Lasse Poertner | 6-3,6-0 |
| ITF M15 Metzingen | 2023/07/26 15:35 | Lasse Poertner v Nicola Kuhn | 6-7,2-6 |
| ITF M15 Tanger | 2023/06/07 09:00 | Lasse Poertner v Andrea Bacaloni | 2-6,6-7 |
| ITF M15 Metzingen | 2022/07/20 11:00 | Lasse Poertner v Deney Wassermann | 3-6,4-6 |
| ITF M15 Uberlingen | 2023/08/17 10:05 | Jakob Schnaitter v Peter Heller | 1-6,7-5,6-4 |
| ITF M15 Uberlingen | 2023/08/16 13:10 | Jakob Schnaitter v Justin Engel | 7-6,6-1 |
| ITF M15 Frankfurt Am Main | 2023/08/13 09:00 | Lucas Gerch v Jakob Schnaitter | 6-4,6-1 |
| ITF M15 Frankfurt Am Main | 2023/08/11 10:00 | Aleksandre Metreveli v Jakob Schnaitter | 6-7,2-6 |
| ITF M15 Frankfurt Am Main | 2023/08/09 13:00 | Jakob Schnaitter v Marcel Zielinski | 6-7,6-2,6-2 |
| ITF M25 Cattolica | 2023/06/20 12:00 | Andrea Picchione v Jakob Schnaitter | 6-7,6-4,7-6 |
| ITF M15 Nyiregyhaza | 2023/06/09 12:00 | Dragos Nicolae Madaras v Jakob Schnaitter | 6-3,6-3 |
| ITF M15 Nyiregyhaza | 2023/06/08 08:00 | Martyn Pawelski v Jakob Schnaitter | 6-4,2-6,6-7 |