Stadium: Court 12 Round: 14 Ground: Clay
| ITF M15 Antalya | 2021/01/29 06:30 | Alexandar Lazarov v Aleksandr Braynin | 6-4,7-6 |
| ITF M15 Chornomorsk | 2021/09/02 09:50 | Aleksandr Braynin v Ilya Snitari | 6-2,1-6,2-6 |
| ITF M15 Chornomorsk | 2021/09/01 07:00 | Vladyslav Manafov v Aleksandr Braynin | 6-7,6-7 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/18 06:00 | Aleksandr Braynin v Yanais Laurent | 6-3,5-0 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/17 07:30 | Aleksandr Braynin v Dian Nedev | 6-3,6-2 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/16 06:00 | Gorazd Srbljak v Aleksandr Braynin | 6-4,3-6,6-3 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/15 09:00 | Vladimir Popov v Aleksandr Braynin | 4-6,5-7 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/14 07:30 | Vasil Kirkov v Aleksandr Braynin | 7-5,5-1 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/12 06:00 | Yanaki Milev v Aleksandr Braynin | 7-6,4-6,4-6 |
| UTR Pro Tennis Series Sofia | 2021/09/04 06:00 | Alexandar Lazarov v Yurii Dzhavakian | 6-3,6-7,5-1 |
| UTR Pro Tennis Series Sofia | 2021/09/03 08:30 | Alexandar Lazarov v Leonid Sheyngezikht | 6-3,5-2 |
| 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 08:00 | Dian Nedev v Alexandar Lazarov | 1-6,4-6 |
| UTR Pro Tennis Series Sofia | 2021/08/31 08:30 | Alec Adamson v Alexandar Lazarov | 2-6,1-5 |
| UTR Pro Tennis Series Sofia | 2021/08/30 13:30 | Ivailo Keremedchiev v Alexandar Lazarov | 1-6,6-6 |
| UTR Pro Tennis Series Sofia | 2021/08/29 12:30 | Mihael Mihaylov v Alexandar Lazarov | 0-6,3-6 |
| ITF M25 Bacau | 2021/08/20 13:00 | Alexandar Lazarov v Arthur Cazaux | 6-7,4-6 |