Stadium: Quadra 2 Round: 19 Ground: Hardcourt outdoor
| Challenger Sao Paulo | 2021/11/28 13:00 | Matias Zukas v Ryan A Dos Santos | 6-2,6-1 |
| ITF M15 Cochabamba | 2021/11/20 15:50 | Matias Zukas v Tomas Farjat | 6-3,4-6,4-6 |
| ITF M15 Cochabamba | 2021/11/19 20:50 | Matias Zukas v Dali Blanch | 6-2,6-0 |
| ITF M15 Cochabamba | 2021/11/18 19:15 | Matias Zukas v Lautaro Agustin Falabella | 6-1,6-2 |
| ITF M15 Cochabamba | 2021/11/17 18:00 | Matias Zukas v Andres Chavez | 6-0,6-2 |
| ITF M25 Aparecida De Goiania | 2021/11/12 15:35 | Igor Marcondes v Matias Zukas | 6-2,6-3 |
| ITF M25 Aparecida De Goiania | 2021/11/11 16:00 | Nicolas Zanellato v Matias Zukas | 1-6,6-3,4-6 |
| ITF M25 Aparecida De Goiania | 2021/11/09 15:35 | Fernando Yamacita v Matias Zukas | 2-6,1-6 |
| Challenger Sao Paulo | 2021/11/28 13:00 | Eduardo Ribeiro v Federico Zeballos | 6-4,7-6 |
| 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 13:35 | Victor Tosetto v Eduardo Ribeiro | 4-6,6-3,6-7 |
| ITF M15 Brasilia | 2021/11/05 15:25 | Eduardo Ribeiro v Gustavo Heide | 3-6,4-6 |
| ITF M15 Brasilia | 2021/11/04 13:00 | Eduardo Ribeiro v Gabriel P Tumasonis | 6-2,6-1 |
| ITF M15 Brasilia | 2021/11/02 21:55 | Igor Marcondes v Eduardo Ribeiro | 5-7,4-6 |
| ITF M25 Rio do Sul | 2021/10/21 15:05 | Facundo Juarez v Eduardo Ribeiro | 6-7,6-3,7-6 |
| ITF M25 Rio do Sul | 2021/10/20 18:05 | Pedro Gabriel Rodrigues v Eduardo Ribeiro | 0-6,2-6 |