Stadium: Court 1 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/09/16 07:00 | Petru-Alexandru Luncanu v George Lazarov | 6-1,1-6,7-6 |
| ITF M15 Sozopol | 2021/09/15 08:30 | George Lazarov v Gabriel Donev | 6-1,6-3 |
| ITF M15 Sozopol | 2021/09/14 07:00 | George Lazarov v Mikhail Minakov | 7-5,4-6,10-4 |
| 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 |
| ITF M25 Skopje | 2021/09/27 13:00 | Franco Emanuel Egea v Dan Radu Munteanu | 6-2,6-2 |
| ITF M15 Bad Waltersdorf | 2021/08/30 07:00 | Dan Radu Munteanu v Kris Krawcewicz | 3-6,1-6 |
| ITF M15 Bad Waltersdorf | 2021/08/29 07:00 | Pietro Pirolt v Dan Radu Munteanu | 1-6,6-4,6-10 |
| ITF M25 Bacau | 2021/08/16 15:00 | Dan Radu Munteanu v Valentin Vanta | 2-6,4-6 |
| ITF M15 Curtea de Arges | 2021/08/09 07:00 | Cezar Cretu v Dan Radu Munteanu | 6-1,6-3 |
| ITF M15 Curtea de Arges | 2021/08/08 08:00 | Dragos Petre Popeanga v Dan Radu Munteanu | 2-6,1-6 |
| ITF M25 Pitesti | 2021/08/01 08:00 | Dan Radu Munteanu v Edris Fetisleam | 0-6,1-6 |
| ITF M15 Bucharest | 2021/05/23 08:30 | Dan Radu Munteanu v Pierre Delage | 3-6,2-6 |