Stadium: Quadra 4 Round: 14 Ground: Clay
| Challenger Rio De Janeiro | 2021/12/14 13:00 | Roy Smith v Federico Zeballos | 6-4,7-6 |
| Challenger Rio De Janeiro | 2021/12/13 16:00 | Federico Zeballos v Rafael Matos | 3-6,6-1,1-6 |
| Challenger Rio De Janeiro | 2021/12/12 18:00 | Federico Zeballos v Paulo A S Dos Santos | 6-1,6-3 |
| Challenger Florianopolis | 2021/12/07 13:00 | Federico Zeballos v Hugo Dellien | 6-7,2-6 |
| Challenger Florianopolis | 2021/12/06 13:00 | Pedro Sakamoto v Federico Zeballos | 5-7,1-6 |
| Challenger Florianopolis | 2021/12/05 12:30 | Luca Castelnuovo v Federico Zeballos | 3-6,1-6 |
| Challenger – Sao Paulo | 2021/11/28 13:00 | Eduardo Ribeiro v Federico Zeballos | 6-4,7-6 |
| Challenger - Brasilia | 2021/11/22 13:00 | Bogdan Bobrov v Federico Zeballos | 6-3,6-3 |