Stadium: Center Court Round: 25 Ground: Hardcourt outdoor
| UTR Pro Sofia | 2023/09/09 06:30 | Ioannis Xilas v Janos Fekete | 0-1 |
| UTR Pro Sofia | 2023/09/08 06:30 | Ioannis Xilas v Hernando J E Isnardi | 2-6,2-6 |
| UTR Pro Sofia | 2023/09/07 08:00 | Ioannis Xilas v Aniss Rafiq | 6-4,6-2 |
| UTR Pro Sofia | 2023/09/06 07:17 | George Lazarov v Ioannis Xilas | 4-6,4-6 |
| UTR Pro Sofia | 2023/09/05 05:00 | Terziev, Simeon v Ioannis Xilas | 2-6,0-0 |
| ITF M25 Herzlia | 2023/08/09 06:30 | Ioannis Xilas v Yshai Oliel | 6-4,3-6,4-6 |
| ITF M25 Herzlia | 2023/08/07 09:30 | Kamyshev, Sean v Ioannis Xilas | 5-7,6-3,2-10 |
| ITF M25 Herzlia | 2023/08/06 06:30 | Alexander Pundel v Ioannis Xilas | 3-6,6-4,9-11 |
| ITF - M15 Héraklion | 2023/11/14 08:30 | Kai Lemstra v Nikolay Nedelchev | 3-6,6-4,6-1 |
| Castellon, Singles Qualifying M-ITF-ESP-34A | 2023/10/19 09:55 | Nikolay Nedelchev v Nicolas Alvarez Varona | 3-6,3-6 |
| Castellon, Singles Qualifying M-ITF-ESP-34A | 2023/10/18 10:05 | Mauro Espinosa Flores v Nikolay Nedelchev | 0-6,6-7 |
| Castellon, Singles Qualifying M-ITF-ESP-34A | 2023/10/17 07:30 | Nikolay Nedelchev v Iamachkine, Pedro | 6-3,5-7,10-4 |
| Castellon, Singles Qualifying M-ITF-ESP-34A | 2023/10/16 08:00 | Nikolay Nedelchev v Albert Pedrico Kravtsov | 4-6,6-2,10-6 |
| Castellon, Singles Qualifying M-ITF-ESP-34A | 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 |