Stadium: Quadra Central Round: 26 Ground: Clay
| Challenger Rio De Janeiro | 2021/12/13 17:20 | Facundo Diaz Acosta v Nicolas Alvarez Varona | 3-6,6-4,3-6 |
| Challenger Florianopolis | 2021/12/08 17:50 | Facundo Juarez v Facundo Diaz Acosta | 3-6,7-5,6-2 |
| Challenger Florianopolis | 2021/12/06 16:35 | Facundo Diaz Acosta v Kaichi Uchida | 6-4,6-3 |
| Challenger Sao Paulo | 2021/12/03 13:00 | Facundo Diaz Acosta v Luciano Darderi | 3-6,4-6 |
| Challenger Sao Paulo | 2021/12/02 17:00 | Thiago Seyboth Wild v Facundo Diaz Acosta | 3-6,5-7 |
| Challenger Sao Paulo | 2021/11/30 16:55 | Facundo Diaz Acosta v Gonzalo Villanueva | 7-5,6-1 |
| Challenger Brasilia | 2021/11/23 20:50 | Thiago Seyboth Wild v Facundo Diaz Acosta | 7-6,6-3 |
| Challenger Campinas | 2021/11/14 16:00 | Facundo Diaz Acosta v Joao Lucas Reis da Silva | 4-6,6-7 |
| Challenger Rio De Janeiro | 2021/12/15 16:35 | Pedro Sakamoto v Roy Smith | 7-6,4-6,3-6 |
| Challenger Rio De Janeiro | 2021/12/13 21:00 | Pedro Sakamoto v Facundo Juarez | 6-4,4-6,6-4 |
| Challenger Florianopolis | 2021/12/06 13:00 | Pedro Sakamoto v Federico Zeballos | 5-7,1-6 |
| Challenger Florianopolis | 2021/12/05 16:55 | Pedro Sakamoto v Joao Victor C Loureiro | 6-3,6-3 |
| Challenger Sao Paulo | 2021/12/01 12:30 | Nicolas Jarry v Pedro Sakamoto | 6-3,6-4 |
| Challenger Sao Paulo | 2021/11/30 12:30 | Pedro Sakamoto v Gilbert S K Junior | 2-6,7-5,7-5 |
| Challenger Campinas | 2021/11/14 18:10 | Pedro Sakamoto v Bogdan Bobrov | 2-6,4-6 |
| Challenger Ambato | 2021/09/22 18:40 | Pedro Sakamoto v Johan Nikles | 3-6,4-6 |