Stadium: Quadra Central Round: 26 Ground: Clay
| ITF Brazil F2 | 2018/05/02 15:00 | Severino, Carlos Eduardo v Santos, Nicolas | 7-6,6-3 |
| ITF Brazil F7 | 2018/10/29 16:05 | Oscar Jose Gutierrez v Severino, Carlos Eduardo | 6-2,3-6,4-6 |
| ITF Brazil F6 | 2018/10/25 17:00 | Estevez Maximiliano v Severino, Carlos Eduardo | 6-4,6-3 |
| ITF Brazil F6 | 2018/10/23 20:55 | Moreno, Federico v Severino, Carlos Eduardo | 4-6,6-4,4-6 |
| ITF Brazil F5 | 2018/10/18 13:00 | Oscar Jose Gutierrez v Severino, Carlos Eduardo | 6-3,6-1 |
| ITF Brazil F5 | 2018/10/16 13:00 | Assuncao Garla, Felipe v Severino, Carlos Eduardo | 4-6,3-6 |
| Challenger Campinas Qual | 2018/09/30 17:35 | Sorgi, Joao Pedro v Severino, Carlos Eduardo | 6-4,6-2 |
| Challenger Binghamton Qual | 2018/07/21 13:00 | Antoine Escoffier v Severino, Carlos Eduardo | 6-2,6-4 |
| ITF Brazil F4 | 2018/05/16 15:30 | Daniel Dutra Da Silva v Severino, Carlos Eduardo | 6-4,6-1 |
| ITF Brazil F7 | 2018/10/30 13:00 | Santos, Nicolas v Damien Wenger | 6-1,6-0 |
| ITF Brazil F6 | 2018/10/25 18:50 | Felipe Meligeni Rodrigues Alves v Santos, Nicolas | 7-6,6-4 |
| ITF Brazil F6 | 2018/10/23 15:20 | Igor Gimenez v Santos, Nicolas | 4-6,1-6 |
| ITF Brazil F5 | 2018/10/18 15:35 | Santos, Nicolas v Francisco Cerundolo | 4-6,1-6 |
| ITF Brazil F5 | 2018/10/16 16:45 | Santos, Nicolas v Okano, Joao Pedro | 6-1,6-1 |
| ITF Peru F3 | 2018/10/12 19:55 | Hidalgo, Diego v Santos, Nicolas | 6-3,6-3 |
| ITF Peru F3 | 2018/10/11 16:55 | Santos, Nicolas v Beretta, Duillo | 6-2,3-6,6-3 |
| ITF Peru F3 | 2018/10/09 15:00 | Santos, Nicolas v Merino, Alexander | 6-1,6-2 |