Stadium: Hard 21 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Selva Gardena | 2023/11/01 12:05 | Kai Lemstra v Hynek Barton | 4-6,4-6 |
| ITF M15 Selva Gardena | 2023/10/30 13:20 | Massimo Giunta v Kai Lemstra | 2-6,4-6 |
| ITF M15 Bad Waltersdorf | 2023/10/05 07:30 | Kai Lemstra v Vlad Andrei Dancu | 1-6,1-6 |
| ITF M15 Bad Waltersdorf | 2023/10/03 07:20 | Jakub Filip v Kai Lemstra | 0-6,0-6 |
| ITF M15 Satu Mare | 2023/09/14 10:35 | Stefan Palosi v Kai Lemstra | 6-4,7-6 |
| ITF M15 Satu Mare | 2023/09/13 09:25 | Kai Lemstra v Simone Agostini | 6-3,6-4 |
| ITF M15 Haren | 2023/09/08 16:05 | Kai Lemstra v Thiemo De Bakker | 3-6,6-7 |
| ITF M15 Haren | 2023/09/07 09:00 | Svyatoslav Gulin v Kai Lemstra | 3-6,6-7 |
| ITF M15 Castellon | 2023/10/19 09:55 | Nikolay Nedelchev v Nicolas Alvarez Varona | 3-6,3-6 |
| ITF M15 Castellon | 2023/10/18 10:05 | Mauro Espinosa Flores v Nikolay Nedelchev | 0-6,6-7 |
| ITF M15 Castellon | 2023/10/17 07:30 | Nikolay Nedelchev v Pedro Iamachkine | 6-3,5-7,10-4 |
| ITF M15 Castellon | 2023/10/16 08:00 | Nikolay Nedelchev v Albert Pedrico Kravtsov | 4-6,6-2,10-6 |
| ITF M15 Castellon | 2023/10/15 10:00 | Nikolay Nedelchev v Jordi Garcia Mestre | 6-0,6-4 |
| ITF M25 Zaragoza | 2023/10/03 10:00 | Nikolay Nedelchev v Kuzey Cekirge | 1-6,1-6 |
| ITF M25 Zaragoza | 2023/10/02 08:00 | Nikolay Nedelchev v Nicolas Rafael Goldberg Alviani | 6-0,6-3 |
| ITF M25 Zaragoza | 2023/10/01 08:00 | Nikolay Nedelchev v Lucca Helguera Casado | 6-2,6-1 |