# 2018 Rio Open – Singles

Dominic Thiem was the defending champion, but lost in the quarterfinals to Fernando Verdasco.
Diego Schwartzman won the title, defeating Verdasco in the final, 6–2, 6–3.

## Seeds

* Marin Čilić (second round)
* Dominic Thiem (quarterfinals)
* Pablo Carreño Busta (second round)
* Albert Ramos Viñolas (second round)
* Fabio Fognini (semifinals)
* Diego Schwartzman (champion)
* Pablo Cuevas (quarterfinals)
* Fernando Verdasco (final)

## 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 | Final | Final | Final | Final |
| 6 | Diego Schwartzman | 7 | 6 | | | | |
| | Nicolás Jarry | 5 | 2 | | | | |
| | Nicolás Jarry | 5 | 2 | 6 | Diego Schwartzman | 6 | 6 |
| | | | | 8 | Fernando Verdasco | 2 | 3 |
| 5 | Fabio Fognini | 1 | 5 | 8 | Fernando Verdasco | 2 | 3 |
| 8 | Fernando Verdasco | 6 | 7 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | M Čilić | 6 | 6 | | | | | | | | | | | | | |
| Q | C Berlocq | 3 | 2 | | 1 | M Čilić | 3 | 6$^8$ | | | | | | | | |
| | G Monfils | 7 | 3 | 7 | | G Monfils | 6 | 7$^{10}$ | | | | | | | | |
| | H Zeballos | 5 | 6 | 5 | | | | | | G Monfils | 3 | 4 | | | | |
| | J Veselý | 2 | 2$^r$ | | | | | | 6 | D Schwartzman | 6 | 6 | | | | |
| | F Delbonis | 6 | 3 | | | F Delbonis | 2 | 3 | | | | | | | | |
| WC | C Ruud | 1$^r$ | | | 6 | D Schwartzman | 6 | 6 | | | | | | | | |
| 6 | D Schwartzman | 4 | | | | | | | | | | | 6 | D Schwartzman | 7 | 6 |
| 4 | A Ramos Viñolas | 6 | 3 | 6 | | | | | | | | | | N Jarry | 5 | 2 |
| | R Dutra Silva | 3 | 6 | 4 | 4 | A Ramos Viñolas | 5 | 3 | | | | | | | | |
| | G García López | 3 | 6$^3$ | | | N Jarry | 7 | 6 | | | | | | | | |
| | N Jarry | 6 | 7$^7$ | | | | | | | N Jarry | 7 | 6 | | | | |
| LL | G Elias | 6 | 5 | 7 | | | | | 7 | P Cuevas | 5 | 3 | | | | |
| | G Pella | 4 | 7 | 5 | LL | G Elias | 5 | 1 | | | | | | | | |
| WC | T Monteiro | 7$^7$ | 6$^{10}$ | 3 | 7 | P Cuevas | 7 | 6 | | | | | | | | |
| 7 | P Cuevas | 6$^5$ | 7$^{12}$ | 6 | | | | | | | | | | | | |

### 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 | F Fognini | 6$^5$ | 7 | 6 | | | | | | | | | | | | | | |
| WC | T Bellucci | 7$^7$ | 5 | 2 | 5 | F Fognini | 4 | 6 | 7$^8$ | | | | | | | | | |
| Q | R Carballés Baena | 6 | 1 | 3$^r$ | | T Sandgren | 6 | 4 | 6$^6$ | | | | | | | | | |
| | T Sandgren | 4 | 6 | 4 | | | | | | 5 | F Fognini | 6$^3$ | 6 | 6 | | | | |
| | A Bedene | 7 | 6 | | | | | | | | A Bedene | 7$^7$ | 3 | 1 | | | | |
| PR | A Haider-Maurer | 5 | 0 | | | A Bedene | 6 | 5 | 6 | | | | | | | | | |
| Q | M Cecchinato | 4 | 1 | | 3 | P Carreño Busta | 2 | 7 | 2 | | | | | | | | | |
| 3 | P Carreño Busta | 6 | 6 | | | | | | | | | | | | 5 | F Fognini | 1 | 5 |
| 8 | F Verdasco | 6 | 3 | 6 | | | | | | | | | | | 8 | F Verdasco | 6 | 7 |
| | L Mayer | 2 | 6 | 3 | 8 | F Verdasco | 6$^3$ | 6 | 6 | | | | | | | | | |
| | V Estrella Burgos | 3 | 3 | | | N Kicker | 7$^7$ | 2 | 0 | | | | | | | | | |
| | N Kicker | 6 | 6 | | | | | | | 8 | F Verdasco | 6 | 6 | | | | | |
| PR | P Andújar | 7 | 6 | | | | | | | 2 | D Thiem | 4 | 0 | | | | | |
| | G Melzer | 5 | 2 | | PR | P Andújar | 2$^r$ | | | | | | | | | | | |
| | D Lajović | 2 | 5 | | 2 | D Thiem | 4 | | | | | | | | | | | |
| 2 | D Thiem | 6 | 7 | | | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Roberto Carballés Baena (qualified)
* Marco Cecchinato (qualified)
* Gastão Elias (qualifying competition, lucky loser)
* Carlos Berlocq (qualified)
* Pedro Sousa (first round)
* Corentin Moutet (qualified)
* Sebastian Ofner (first round)
* Alessandro Giannessi (qualifying competition)

### Qualifiers

* Roberto Carballés Baena
* Marco Cecchinato
* Corentin Moutet (withdrew due to a right knee injury)
* Carlos Berlocq

### Lucky losers

* Gastão Elias

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Roberto Carballés Baena | 4 | 6 | 3 | | | | |
| | Carlos Taberner | 6 | 1 | 0$^r$ | | | | |
| | Carlos Taberner | 6 | 1 | 0$^r$ | 1 | Roberto Carballés Baena | 6 | 6 |
| | | | | | 8 | Alessandro Giannessi | 3 | 2 |
| | Guilherme Clezar | 7$^7$ | 4 | 3 | 8 | Alessandro Giannessi | 3 | 2 |
| 8 | Alessandro Giannessi | 6$^3$ | 6 | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Marco Cecchinato | 6 | 6 | | | | |
| | João Domingues | 3 | 2 | | | | |
| | João Domingues | 3 | 2 | 2 | Marco Cecchinato | 7$^{11}$ | 6 |
| | | | | | Renzo Olivo | 6$^9$ | 2 |
| | Renzo Olivo | 6 | 6 | | Renzo Olivo | 6$^9$ | 2 |
| 5 | Pedro Sousa | 4 | 3 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Gastão Elias | 6 | 6 | | | | | |
| WC | José Pereira | 4 | 2 | | | | | |
| WC | José Pereira | 4 | 2 | 3 | Gastão Elias | 2 | 7$^8$ | 4 |
| | | | | 6 | Corentin Moutet | 6 | 6$^6$ | 6 |
| WC | Thiago Seyboth Wild | 2 | 0 | 6 | Corentin Moutet | 6 | 6$^6$ | 6 |
| 6 | Corentin Moutet | 6 | 6 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Carlos Berlocq | 6 | 7 | | | | | |
| WC | João Souza | 1 | 5 | | | | | |
| WC | João Souza | 1 | 5 | | 4 | Carlos Berlocq | 6 | 7$^7$ |
| | | | | | | Tommy Robredo | 4 | 6$^3$ |
| | Tommy Robredo | 5 | 6 | 6 | | Tommy Robredo | 4 | 6$^3$ |
| 7 | Sebastian Ofner | 7 | 2 | 1 | | | | |