Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Uberlingen | 2023/08/18 10:00 | Lasse Poertner v Jakob Schnaitter | 2-6,4-6 |
| 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 Doha | 2023/10/05 12:30 | Koray Kirci v Christian Sigsgaard | 6-7,1-6 |
| ITF M15 Sharm El Sheikh | 2023/09/27 10:40 | Daniel Ibragimov v Koray Kirci | 5-7,2-6 |
| ITF M25 Sharm El Sheikh | 2023/09/20 08:30 | Yanki Erel v Koray Kirci | 6-4,3-6,6-3 |
| Challenger Istanbul | 2023/09/06 09:35 | Denis Yevseyev v Koray Kirci | 6-2,7-6 |
| Challenger Istanbul | 2023/09/05 08:35 | Leo Borg v Koray Kirci | 1-6,6-3,3-6 |
| Challenger Astana | 2023/07/25 07:20 | Dmitry Popko v Koray Kirci | 6-4,4-6,6-1 |
| ITF M15 Tehran | 2023/06/15 06:30 | Erik Arutiunian v Koray Kirci | 6-2,6-4 |
| ITF M25 Bodrum | 2023/05/23 06:30 | Valentin Vacherot v Koray Kirci | 6-1,6-4 |