| Challenger Rio De Janeiro | 2021/12/15 13:00 | Gabriel Decamps v Nicolas Barrientos | 6-1,6-4 |
| Challenger Rio De Janeiro | 2021/12/13 14:30 | Nicolas Barrientos v Pedro Boscardin Dias | 6-4,6-2 |
| Challenger Rio De Janeiro | 2021/12/12 16:00 | Nicolas Barrientos v Joao Giannella | 6-1,6-2 |
| Challenger Florianopolis | 2021/12/10 15:30 | Nicolas Barrientos v Genaro Alberto Olivieri | 2-6,4-6 |
| Challenger Florianopolis | 2021/12/09 13:00 | Nicolas Barrientos v Gonzalo Villanueva | 7-6,6-1 |
| Challenger Florianopolis | 2021/12/07 16:50 | Juan Pablo Ficovich v Nicolas Barrientos | 3-6,0-6 |
| Challenger Florianopolis | 2021/12/06 14:20 | Alejandro Gomez v Nicolas Barrientos | 4-6,2-6 |
| Challenger Florianopolis | 2021/12/05 15:25 | Victor Tosetto v Nicolas Barrientos | 1-6,1-6 |