Stadium: Court 1 Round: 19 Ground: Clay
| 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 |
| Challenger Brasilia | 2021/11/21 13:00 | Joao Vieira v Federico Zeballos | 0-6,3-6 |
| Challenger Guayaquil | 2021/10/31 16:00 | Nicolas Alvarez v Federico Zeballos | 6-1,6-0 |
| Challenger Rio De Janeiro | 2021/12/12 18:00 | Gabriel P Tumasonis v Matos, Rafael | 3-6,5-7 |
| Challenger - Florianopolis | 2021/12/05 13:55 | Cuevas, Martin v Matos, Rafael | 6-1,3-6,0-6 |
| Challenger Sao Paulo | 2021/11/28 17:15 | Luciano Darderi v Matos, Rafael | 6-3,6-3 |
| Challenger Brasilia | 2021/11/22 14:25 | Luciano Darderi v Matos, Rafael | 7-6,2-6,6-3 |
| Challenger Brasilia | 2021/11/21 21:50 | Margaroli, Luca v Matos, Rafael | 4-6,3-6 |
| Montevideo, Uruguay | 2021/11/07 15:00 | Nicolas Alvarez Varona v Matos, Rafael | 6-2,6-2 |
| Challenger - Buenos Aires | 2021/10/18 15:00 | Francisco Comesana v Matos, Rafael | 6-4,6-1 |
| Challenger - Buenos Aires | 2021/10/17 14:00 | Llanes, Francisco v Matos, Rafael | 0-6,6-4,1-6 |