Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| ITF M15 - Sozopol | 2021/09/13 08:00 | Luigi Castelletti v George Lazarov | 3-6,4-6 |
| UTR Pro Tennis Series - Sofia | 2021/09/04 07:30 | Alexander Lazov v George Lazarov | 3-5 |
| UTR Pro Tennis Series - Sofia | 2021/09/03 07:00 | George Lazarov v Christos Keisidis | 6-4,6-4 |
| UTR Pro Tennis Series - Sofia | 2021/09/02 07:00 | Ivan Mikhaylyuk v George Lazarov | 3-6,1-6 |
| UTR Pro Tennis Series - Sofia | 2021/09/01 06:30 | Volodymyr Uzhylovskyi v George Lazarov | 1-6,6-1,1-5 |
| 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 12:00 | Warren Sinius v George Lazarov | 2-6,2-5 |
| UTR Pro Tennis Series - Sofia | 2021/08/29 12:00 | George Lazarov v Mario Radev | 6-0,6-1 |
| ITF M15 - Sozopol | 2021/09/13 08:00 | Piotr Kusiewicz v Mikhail Minakov | 6-7,6-1,4-10 |
| ITF M15 - Pärnu | 2021/08/02 11:00 | Roni Rikkonen v Mikhail Minakov | 6-4,6-3 |
| ITF M25 Velenje | 2021/07/04 07:30 | Nemanja Malesevic v Mikhail Minakov | 7-5,6-7,10-8 |
| ITF M25 - Wrocław | 2021/06/27 11:00 | Mikhail Minakov v Tomas Jirousek | 6-3,3-6,1-10 |
| ITF M15 - Helsinki | 2021/06/02 11:30 | Mikhail Minakov v Yannik Steinegger | 4-6,1-6 |
| ITF M15 - Helsinki | 2021/06/01 08:45 | Arvid Nordquist v Mikhail Minakov | 3-6,3-6 |
| ITF M15 - Helsinki | 2021/05/31 10:00 | Nuutti Jokinen v Mikhail Minakov | 4-6,1-6 |
| ITF - M15 Antalya | 2021/01/17 09:00 | Mikhail Minakov v Nicolae Frunza | 6-7,1-6 |