# 2018 Brasil Open – Singles

Pablo Cuevas was the three-time defending champion, but lost in the semifinals to Fabio Fognini.
Fognini went on to win the title, defeating Nicolás Jarry in the final, 1–6, 6–1, 6–4.

## Seeds

The top four seeds receive a bye into the second round.
* Albert Ramos Viñolas (quarterfinals)
* Fabio Fognini (champion)
* Pablo Cuevas (semifinals)
* Gaël Monfils (second round)
* Leonardo Mayer (quarterfinals)
* Guido Pella (second round)
* Tennys Sandgren (first round)
* Federico Delbonis (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| | Nicolás Jarry | 6$^5$ | 6 | 6 | | | | | |
| | Horacio Zeballos | 7$^7$ | 4 | 4 | | | | | |
| | Horacio Zeballos | 7$^7$ | 4 | 4 | | Nicolás Jarry | 6 | 1 | 4 |
| | | | | | 2 | Fabio Fognini | 1 | 6 | 6 |
| 3 | Pablo Cuevas | 4 | 2 | | 2 | Fabio Fognini | 1 | 6 | 6 |
| 2 | Fabio Fognini | 6 | 6 | | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | A Ramos Viñolas | 6 | 6 | | | | | | | | | | |
| Q | G Clezar | 6 | 1 | 7 | Q | G Clezar | 3 | 4 | | | | | | | | | | |
| WC | T Monteiro | 3 | 6 | 5 | | | | | | 1 | A Ramos Viñolas | 7$^8$ | 4 | 6$^3$ | | | | |
| | N Jarry | 6 | 1 | 7 | | | | | | | N Jarry | 6$^6$ | 6 | 7$^7$ | | | | |
| | D Lajović | 4 | 6 | 5 | | N Jarry | 6$^2$ | 6 | 7$^7$ | | | | | | | | | |
| WC | C Moutet | 6 | 1 | 2 | 6 | G Pella | 7$^7$ | 4 | 6$^2$ | | | | | | | | | |
| 6 | G Pella | 4 | 6 | 6 | | | | | | | | | | | N Jarry | 6$^5$ | 6 | 6 |
| | | | | | | | | | | | | | | | H Zeballos | 7$^7$ | 4 | 4 |
| | | | | | 4 | G Monfils | 3 | 6 | 3 | | | | | | | | | |
| | T Bellucci | 6$^2$ | 6 | 3 | | H Zeballos | 6 | 3 | 6 | | | | | | | | | |
| | H Zeballos | 7$^7$ | 3 | 6 | | | | | | | H Zeballos | 6$^3$ | 6 | 6 | | | | |
| | N Kicker | 7$^7$ | 6 | | | | | | | | R Dutra Silva | 7$^7$ | 2 | 4 | | | | |
| | V Estrella Burgos | 6$^5$ | 3 | | | N Kicker | 4 | 2 | | | | | | | | | | |
| | R Dutra Silva | 6 | 6 | | | R Dutra Silva | 6 | 6 | | | | | | | | | | |
| 7 | T Sandgren | 0 | 4 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | L Mayer | 5 | 7$^{12}$ | 7$^7$ | | | | | | | | | | | | | | |
| | G Elias | 7 | 6$^{10}$ | 6$^5$ | 5 | L Mayer | 7 | 6 | | | | | | | | | | |
| | C Berlocq | 3 | 6 | 6 | | C Berlocq | 5 | 4 | | | | | | | | | | |
| WC | T Seyboth Wild | 6 | 3 | 2 | | | | | | 5 | L Mayer | 2 | 7$^{15}$ | 6$^5$ | | | | |
| Q | S Ofner | 6 | 6 | | | | | | | 3 | P Cuevas | 6 | 6$^{13}$ | 7$^7$ | | | | |
| | M Cecchinato | 3 | 3 | | Q | S Ofner | 4 | 6$^4$ | | | | | | | | | | |
| | | | | | 3 | P Cuevas | 6 | 7$^7$ | | | | | | | | | | |
| | | | | | | | | | | | | | | | 3 | P Cuevas | 4 | 2 |
| 8 | F Delbonis | 6 | 6 | | | | | | | | | | | | 2 | F Fognini | 6 | 6 |
| | R Carballés Baena | 4 | 4 | | 8 | F Delbonis | 6$^3$ | 6 | 4 | | | | | | | | | |
| | G Melzer | 4 | 6 | 3 | | G García López | 7$^7$ | 4 | 6 | | | | | | | | | |
| | G García López | 6 | 3 | 6 | | | | | | | G García López | 4 | 2 | | | | | |
| Q | R Olivo | 6 | 6$^6$ | 5 | | | | | | 2 | F Fognini | 6 | 6 | | | | | |
| Q | J Domingues | 2 | 7$^8$ | 7 | Q | J Domingues | 5 | 1 | | | | | | | | | | |
| | | | | | 2 | F Fognini | 7 | 6 | | | | | | | | | | |

## Qualifying
### Seeds

* Sebastian Ofner (qualified)
* Tommy Robredo (first round)
* Renzo Olivo (qualified)
* João Domingues (qualified)
* Guilherme Clezar (qualified)
* João Souza (first round, retired)
* Daniel Muñoz de la Nava (first round, retired)
* Roberto Quiroz (qualifying competition)

### Qualifiers

* Sebastian Ofner
* Guilherme Clezar
* Renzo Olivo
* João Domingues

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Sebastian Ofner | 6 | 6 | | | | | |
| WC | Rafael Matos | 3 | 4 | | | | | |
| WC | Rafael Matos | 3 | 4 | 1 | Sebastian Ofner | 4 | 6 | 6 |
| | | | | | Pedro Cachin | 6 | 2 | 4 |
| | Pedro Cachin | 7$^7$ | 4 | | Pedro Cachin | 6 | 2 | 4 |
| 7 | Daniel Muñoz de la Nava | 6$^3$ | 1$^r$ | | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Tommy Robredo | 6$^5$ | 4 | | | | |
| | Pedro Sakamoto | 7$^7$ | 6 | | | | |
| | Pedro Sakamoto | 7$^7$ | 6 | | Pedro Sakamoto | 2 | 1 |
| | | | | 5 | Guilherme Clezar | 6 | 6 |
| WC | Fernando Yamacita | 1 | 6$^4$ | 5 | Guilherme Clezar | 6 | 6 |
| 5 | Guilherme Clezar | 6 | 7$^7$ | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Renzo Olivo | 6 | 6 | | | | | |
| | Ivan Gakhov | 4 | 3 | | | | | |
| | Ivan Gakhov | 4 | 3 | | 3 | Renzo Olivo | 6 | 7$^7$ |
| | | | | | 8 | Roberto Quiroz | 0 | 6$^5$ |
| | Daniel Dutra da Silva | 6 | 2 | 3 | 8 | Roberto Quiroz | 0 | 6$^5$ |
| 8 | Roberto Quiroz | 4 | 6 | 6 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | João Domingues | 6 | 6 | | | | |
| | José Hernández-Fernández | 2 | 4 | | | | |
| | José Hernández-Fernández | 2 | 4 | 4 | João Domingues | 6 | 6 |
| | | | | | Ivan Nedelko | 2 | 1 |
| | Ivan Nedelko | 7$^7$ | 2 | | Ivan Nedelko | 2 | 1 |
| 6 | João Souza | 6$^5$ | 1$^r$ | | | | |