Stadium: Quadra 3 Round: 19 Ground: Clay
| Challenger Campinas | 2021/11/14 16:00 | Facundo Diaz Acosta v Joao Lucas Reis da Silva | 4-6,6-7 |
| ITF M25 Aparecida De Goiania | 2021/11/12 16:20 | Daniel Dutra Da Silva v Joao Lucas Reis da Silva | 6-0,6-3 |
| ITF M25 Aparecida De Goiania | 2021/11/11 13:30 | Eduardo Ribeiro v Joao Lucas Reis da Silva | 2-6,6-4,3-6 |
| ITF M25 Aparecida De Goiania | 2021/11/09 15:10 | Sean Hess v Joao Lucas Reis da Silva | 1-6,6-7 |
| ITF M15 Brasilia | 2021/11/03 22:35 | Joao Lucas Reis da Silva v Marcelo Zormann | 6-7,6-7 |
| Challenger Bogota | 2021/10/17 16:45 | Joao Lucas Reis da Silva v Alejandro H Franco | 5-7,4-6 |
| ITF M25 Lima | 2021/10/12 18:40 | Joao Lucas Reis da Silva v Murkel Dellien | 2-6,4-6 |
| ITF M25 Lima | 2021/10/07 20:20 | Michel Vernier v Joao Lucas Reis da Silva | 6-4,6-7,6-1 |
| Challenger Campinas | 2021/11/14 14:00 | Luis Rodrigues Batista v Nicolas Alvarez | 1-6,0-6 |
| Challenger Montevideo | 2021/11/07 16:30 | Nicolas Alvarez v Tomas Lipovsek Puches | 2-6,2-6 |
| Challenger Guayaquil | 2021/11/04 15:00 | Nicolas Alvarez v Facundo Bagnis | 2-6,6-4,1-6 |
| Challenger Guayaquil | 2021/11/02 21:45 | Nicolas Alvarez v Thiago Agustin Tirante | 4-6,7-5,6-3 |
| Challenger Guayaquil | 2021/11/01 16:00 | Nicolas Alvarez v Nicolas Barrientos | 2-6,6-4,6-4 |
| Challenger Guayaquil | 2021/10/31 16:00 | Nicolas Alvarez v Federico Zeballos | 6-1,6-0 |
| Challenger Lima | 2021/10/26 00:40 | Nicolas Kicker v Nicolas Alvarez | 4-6,7-6,6-2 |
| Challenger Buenos Aires | 2021/10/18 21:00 | Nicolas Kicker v Nicolas Alvarez | 6-3,2-6,6-3 |