Stadium: Court 7 Round: 25 Ground: Hardcourt outdoor
| 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 |
| ITF M25 Skopje | 2021/10/01 12:30 | Alexander Cozbinov v Matteo Arnaldi | 0-6,1-6 |
| ITF M25 Skopje | 2021/10/01 08:15 | Alexander Cozbinov v Stefano Battaglino | 6-2,7-5 |
| ITF M25 Skopje | 2021/09/28 11:15 | Mariano Navone v Alexander Cozbinov | 6-3,5-7,1-6 |
| Challenger Istanbul | 2021/09/12 08:00 | Adrian Andreev v Alexander Cozbinov | 6-4,6-4 |
| ITF M25 Trier | 2021/08/26 09:30 | Tim Handel v Alexander Cozbinov | 6-2,3-6,6-2 |
| ITF M15 Sozopol | 2021/10/13 09:00 | Valentin Vanta v Matic Dimic | 7-6,6-0 |
| ITF M15 Sozopol | 2021/10/11 10:00 | Valentin Vanta v Stefan Luckanov | 6-2,6-0 |
| ITF M15 Sozopol | 2021/10/10 13:30 | Valentin Vanta v Nikola Keremedchiev | 6-4,6-3 |
| ITF M15 Sozopol | 2021/09/14 09:00 | Martin Krumich v Valentin Vanta | 7-5,7-6 |
| UTR Pro Tennis Series Sofia | 2021/09/02 08:30 | Alexandar Lazarov v Valentin Vanta | 6-4,3-6,5-3 |
| UTR Pro Tennis Series Sofia | 2021/09/01 06:30 | Valentin Vanta v Warren Sinius | 6-1,5-0 |
| UTR Pro Tennis Series Sofia | 2021/08/31 09:30 | Valentin Vanta v George Lazarov | 6-4,6-0 |
| UTR Pro Tennis Series Sofia | 2021/08/30 13:30 | Valentin Vanta v Volodymyr Uzhylovskyi | 6-2,6-3 |