Stadium: Court 3 Round: 14 Ground: Hardcourt outdoor
| Challenger Ortisei | 2021/11/09 09:00 | Ryan Peniston v Alexander Cozbinov | 6-3,6-2 |
| Challenger Ortisei | 2021/11/08 11:15 | Alexander Cozbinov v Aldin Setkic | 6-3,3-6,7-6 |
| ITF M25 Hamburg | 2021/10/19 14:00 | Lenny Hampel v Alexander Cozbinov | 6-4,6-2 |
| ITF M15 Sozopol | 2021/10/14 17:15 | Alexander Cozbinov v Marko Tepavac | 2-6,5-7 |
| ITF M15 Sozopol | 2021/10/14 12:30 | Alexander Cozbinov v Valentin Vanta | 6-2,6-1 |
| ITF M15 Sozopol | 2021/10/08 07:00 | Yan Bondarevskiy v Alexander Cozbinov | 1-6,6-2,6-1 |
| ITF M15 Sozopol | 2021/10/07 06:50 | Anthony Genov v Alexander Cozbinov | 3-6,1-6 |
| ITF M15 Sozopol | 2021/10/06 09:35 | Martin Dimitrov v Alexander Cozbinov | 1-6,3-6 |
| Challenger Bratislava | 2021/11/07 15:55 | Alexandar Lazarov v Alexander Shevchenko | 6-4,5-7,3-6 |
| Challenger Lima | 2021/10/26 17:20 | Alejandro Tabilo v Alexandar Lazarov | 6-1,6-4 |
| Challenger Lima | 2021/10/25 17:00 | Lucas Catarina v Alexandar Lazarov | 4-6,2-6 |
| Challenger Lima | 2021/10/24 16:00 | Luca Castelnuovo v Alexandar Lazarov | 4-6,5-7 |
| Challenger Bogota | 2021/10/17 16:30 | Alexandar Lazarov v Bart Stevens | 6-1,3-6,3-6 |
| ITF M15 Sozopol | 2021/10/08 07:00 | Alexandar Lazarov v Billy Harris | 4-6,2-6 |
| ITF M15 Sozopol | 2021/10/07 07:00 | Alexandar Lazarov v Adam Jurajda | 6-1,6-4 |
| ITF M15 Sozopol | 2021/10/05 10:00 | Alexandar Lazarov v Petr Nesterov | 6-1,6-1 |