| 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 |
| ITF M25 Bacau | 2021/08/19 15:35 | Alexandar Lazarov v Dan Alexandru Tomescu | 6-2,6-4 |
| ITF M25 Bacau | 2021/08/18 11:25 | Alexandar Lazarov v Victor Vlad Cornea | 6-4,6-4 |
| ITF M25 Telavi | 2021/08/01 06:00 | Alessandro Ingarao v Alexandar Lazarov | 2-6,2-6 |
| 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 |
| ITF M25 Bacau | 2021/08/17 07:00 | Toby Martin v Valentin Vanta | 6-7,6-2,12-10 |
| ITF M25 Bacau | 2021/08/16 15:00 | Dan Radu Munteanu v Valentin Vanta | 2-6,4-6 |
| ITF M15 Curtea de Arges | 2021/08/08 08:00 | Valentin Vanta v Stefan Palosi | 1-6,3-6 |
| ITF M25 Pitesti | 2021/08/02 06:00 | Valentin Vanta v Edris Fetisleam | 1-6,4-6 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/18 07:30 | Vasil Kirkov v Valentin Vanta | 6-3,7-5 |