Stadium: Court 1 Round: 26 Ground: Clay
| ITF M15 - Castellón | 2023/10/18 10:05 | Mauro Espinosa Flores v Nikolay Nedelchev | 0-6,6-7 |
| ITF M15 - Castellón | 2023/10/17 07:30 | Nikolay Nedelchev v Pedro Iamachkine | 6-3,5-7,10-4 |
| ITF M15 - Castellón | 2023/10/16 08:00 | Nikolay Nedelchev v Albert Pedrico Kravtsov | 4-6,6-2,10-6 |
| ITF M15 - Castellón | 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 |
| ITF - M25 Sabadell | 2023/09/26 09:40 | Nikolay Nedelchev v Iker Urribarrens | 6-2,2-6,7-10 |
| ITF M15 - Castellón | 2023/10/18 12:40 | Antonio Cayetano March v Nicolas Alvarez Varona | 2-6,3-6 |
| ITF M15 - Vigo | 2023/10/13 13:15 | Nicolas Alvarez Varona v Alejo Sanchez Quilez | 1-6,6-7 |
| ITF M15 - Vigo | 2023/10/12 14:35 | Nicolas Alvarez Varona v Tomas C Abasolo | 6-3,6-2 |
| Challenger - Murcia | 2023/04/04 15:50 | Borna Gojo v Nicolas Alvarez Varona | 6-3,6-2 |
| Challenger - Tenerife - Kwal. | 2023/02/06 10:00 | Nicolas Alvarez Varona v Oscar Jose Gutierrez | 3-6,3-6 |
| Challenger - Tenerife | 2023/02/04 13:00 | Nicolas Alvarez Varona v Matteo Arnaldi | 3-6,4-6 |
| Challenger - Tenerife | 2023/02/03 11:00 | Nicolas Alvarez Varona v Alejandro Moro Canas | 1-6,6-2,6-3 |
| Challenger - Tenerife | 2023/02/01 18:20 | Ryan Peniston v Nicolas Alvarez Varona | 7-5,2-6,1-6 |