Stadium: Quadra Central Round: 14 Ground: Clay
| 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 M15 Recife | 2021/09/22 19:30 | Joao Lucas Reis da Silva v Eduardo Ribeiro | 1-6,7-5,4-6 |
| ITF Brazil F9 | 2018/11/14 13:30 | Eduardo Ribeiro v Joao Lucas Reis da Silva | 1-6,1-6 |
| Challenger Campinas | 2021/11/15 15:25 | Joao Lucas Reis da Silva v Nicolas Alvarez | 6-2,3-6,3-6 |
| 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 |
| Challenger Florianopolis | 2021/12/05 15:45 | Eduardo Ribeiro v Igor Marcondes | 2-6,1-6 |
| Challenger Sao Paulo | 2021/11/29 13:00 | Matias Zukas v Eduardo Ribeiro | 7-5,6-3 |
| 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 |