| UTR Pro Tennis Series Copenhagen | 2021/06/19 07:00 | Mick Lescure v Javier A M Crespo | 2-6,7-5,0-0 |
| UTR Pro Tennis Series Copenhagen | 2021/06/17 09:30 | Javier A M Crespo v Jesper Klov Nilsson | 6-2,6-0 |
| UTR Pro Tennis Series Zadar | 2021/11/18 15:30 | Janos Fekete v Mario Radev | 6-0,5-2 |
| UTR Pro Tennis Series Zadar | 2021/11/16 16:00 | Jerko Brkic v Mario Radev | 6-3,6-1 |
| UTR Pro Tennis Series Zadar | 2021/11/15 10:30 | Eduard Shcherbyna v Mario Radev | 6-1,6-3 |
| UTR Pro Tennis Series Zadar | 2021/11/14 10:00 | Mario Radev v Ante P Ercegovic | 7-5,5-2 |
| UTR Pro Tennis Series Sofia | 2021/09/01 08:00 | Christos Keisidis v Mario Radev | 6-1,4-6,6-4 |
| UTR Pro Tennis Series Sofia | 2021/08/31 08:00 | Denislav Prodanov v Mario Radev | 6-1,1-6,6-3 |
| UTR Pro Tennis Series Sofia | 2021/08/30 10:45 | Mario Radev v Josh Sheehy | 1-6,2-6 |
| UTR Pro Tennis Series Sofia | 2021/08/29 12:00 | George Lazarov v Mario Radev | 6-0,6-1 |