Stadium: Court 8 Round: 62 Ground: Clay
| ITF M15 Sozopol | 2021/10/11 10:00 | Dan Radu Munteanu v Matic Dimic | 3-6,2-6 |
| ITF M15 Sozopol | 2021/10/10 13:30 | Dan Radu Munteanu v Dawid Taczala | 6-4,6-2 |
| ITF M15 Sozopol | 2021/10/04 08:00 | George Lazarov v Dan Radu Munteanu | 6-0,6-2 |
| 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 |
| UTR Pro Tennis Series Sofia | 2021/09/01 09:30 | Leonid Sheyngezikht v Alexandru Luca | 6-3,6-2 |
| UTR Pro Tennis Series Sofia | 2021/08/31 06:30 | Tadija Radovanovic v Alexandru Luca | 6-3,6-2 |
| UTR Pro Tennis Series Sofia | 2021/08/30 10:00 | Alexandru Luca v Ivan Mikhaylyuk | 2-6,2-6 |
| UTR Pro Tennis Series Sofia | 2021/08/29 12:30 | Ivan Penev v Alexandru Luca | 6-1,6-4 |