| UTR Pro Tennis Series Manzanillo | 2021/12/08 16:30 | Santiago Arredondo v Javier Alejandro Mendoza Crespo | 4-6,6-3,3-6 |
| UTR Pro Tennis Series Manzanillo | 2021/12/07 16:30 | Santiago Arredondo v Jose Antonio Rodriguez Rodriguez | 2-6,7-5,2-5 |
| UTR Pro Tennis Series Manzanillo | 2021/12/06 14:00 | Santiago Arredondo v Luis Pineda | 6-3,7-6 |
| UTR Pro Tennis Series Florida | 2021/09/19 12:00 | Santiago Arredondo v Yaron Guberman | 7-5,5-3 |
| UTR Pro Tennis Series Florida | 2021/09/18 16:00 | Adam Ambrozy v Santiago Arredondo | 3-6,4-6 |
| UTR Pro Tennis Series Florida | 2021/09/18 13:00 | Santiago Arredondo v Michal Schmid | 3-6,2-6 |
| UTR Pro Tennis Series Manzanillo | 2021/12/08 15:00 | Luis Pineda v Mario Radev | 6-1,5-3 |
| UTR Pro Tennis Series Manzanillo | 2021/12/06 14:00 | Jose Antonio Rodriguez Rodriguez v Mario Radev | 6-1,6-1 |
| 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 |