| UTR Pro Tennis Series Barcelona | 2021/06/22 12:30 | Federico Zeballos v Juan C Garcia Garcia | 6-3,5-4 |
| UTR Pro Tennis Series Barcelona | 2021/06/21 08:00 | Alejandro Garcia v Federico Zeballos | 3-6,5-7 |
| Challenger Prostejov | 2021/06/13 12:30 | Federico Zeballos v Skander Mansouri | 6-7,0-6 |
| Challenger Oeiras | 2021/05/24 10:00 | Filip Cristian Jianu v Federico Zeballos | 6-4,7-5 |
| Challenger Oeiras | 2021/05/23 10:00 | Federico Zeballos v Vladyslav Orlov | 1-6,6-0,7-6 |
| UTR Pro Tennis Series Florida | 2021/03/12 15:30 | Cristian C. Rodriguez Sanchez v Federico Zeballos | 7-6,1-6,6-6 |
| UTR Pro Tennis Series Florida | 2021/03/11 20:00 | Fletcher Scott v Federico Zeballos | 6-1,6-1 |
| UTR Pro Tennis Series Florida | 2021/03/10 20:00 | Matthew Segura v Federico Zeballos | 6-3,5-3 |
| UTR Pro Tennis Series Barcelona | 2021/06/22 12:30 | Alejandro Garcia v Jay Friend | 4-6,6-0,3-6 |
| UTR Pro Tennis Series Barcelona | 2021/06/21 08:00 | Juan C Garcia Garcia v Jay Friend | 5-7,2-5 |