Stadium: Court 5 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/10/05 10:00 | Alexandar Lazarov v Petr Nesterov | 6-1,6-1 |
| ATP Sofia | 2021/09/29 15:35 | Alexandar Lazarov v Filip Krajinovic | 0-6,3-6 |
| Challenger Kyiv | 2021/09/05 08:00 | Aleksandr Braynin v Alexandar Lazarov | 7-6,6-4 |
| 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 |
| ITF M15 Sozopol | 2021/10/05 10:00 | Peter Goldsteiner v Adam Jurajda | 6-7,6-7 |
| ITF M25 Prostejov | 2021/08/17 09:35 | Adam Jurajda v Dalibor Svrcina | 0-6,0-6 |
| Challenger Prostejov | 2021/06/13 11:25 | Adam Jurajda v Jeroen Vanneste | 6-4,6-7,1-6 |
| ITF M15 Cairo | 2021/04/14 12:25 | Adam Jurajda v Edoardo Lavagno | 4-6,3-6 |