Stadion: Court Diego Schwarzman Round: 25 Ground: Clay
| Challenger - Buenos Aires | 2021/10/18 16:25 | Carlos Gomez-Herrera v Lautaro Midon | 7-6,6-2 |
| Challenger - Buenos Aires | 2021/10/17 14:00 | Lautaro Midon v Maximiliano Estevez | 7-6,2-6,6-1 |
| 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 - Brasilien | 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 |