# 2018 Argentina Open – Singles

Alexandr Dolgopolov was the defending champion, but withdrew before the tournament began.
Dominic Thiem won the title, defeating Aljaž Bedene in the final, 6–2, 6–4.

## Seeds

The top four seeds receive a bye into the second round.
* Dominic Thiem (champion)
* Pablo Carreño Busta (second round)
* Albert Ramos Viñolas (second round)
* Fabio Fognini (second round)
* Diego Schwartzman (quarterfinals)
* Kyle Edmund (withdrew)
* Pablo Cuevas (first round)
* Fernando Verdasco (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 |
| 1 | Dominic Thiem | 6 | 6 | | | | | |
| | Gaël Monfils | 2 | 1 | | | | | |
| | Gaël Monfils | 2 | 1 | | 1 | Dominic Thiem | 6 | 6 |
| | | | | | | Aljaž Bedene | 2 | 4 |
| | Aljaž Bedene | 6 | 2 | 6 | | Aljaž Bedene | 2 | 4 |
| | Federico Delbonis | 4 | 6 | 1 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | D Thiem | 6 | 6 | | | | | | | | | |
| | H Zeballos | 6 | 6 | | | H Zeballos | 4 | 3 | | | | | | | | | |
| Q | M Cecchinato | 1 | 4 | | | | | | 1 | D Thiem | 7$^9$ | 6 | | | | | |
| WC | N Kicker | 6 | 4 | 4 | | | | | | G Pella | 6$^7$ | 4 | | | | | |
| | G Pella | 2 | 6 | 6 | | G Pella | 6 | 6 | | | | | | | | | |
| SE | T Monteiro | 2 | 5 | | 8 | F Verdasco | 2 | 4 | | | | | | | | | |
| 8 | F Verdasco | 6 | 7 | | | | | | | | | | | 1 | D Thiem | 6 | 6 |
| | | | | | | | | | | | | | | | G Monfils | 2 | 1 |
| | | | | | 4 | F Fognini | 3 | 3 | | | | | | | | | |
| Q | R Dutra Silva | 7$^7$ | 2 | 4 | | L Mayer | 6 | 6 | | | | | | | | | |
| | L Mayer | 6$^4$ | 6 | 6 | | | | | | L Mayer | 4 | 6 | 3 | | | | |
| | D Lajović | 7$^7$ | 6 | | | | | | | G Monfils | 6 | 3 | 6 | | | | |
| Q | F Bagnis | 6$^4$ | 1 | | | D Lajović | 4 | 3 | | | | | | | | | |
| | G Monfils | 6 | 6 | | | G Monfils | 6 | 6 | | | | | | | | | |
| 7 | P Cuevas | 1 | 4 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | D Schwartzman | 6 | 6 | | | | | | | | | | | | | |
| PR | A Haider-Maurer | 4 | 3 | 5 | D Schwartzman | 3 | 6 | 6 | | | | | | | | |
| Q | T Bellucci | 6 | 6 | Q | T Bellucci | 6 | 3 | 2 | | | | | | | | |
| WC | P Cachin | 2 | 1 | | | | | | 5 | D Schwartzman | 4 | 4 | | | | |
| | J Veselý | 0 | 3 | | | | | | | A Bedene | 6 | 6 | | | | |
| | A Bedene | 6 | 6 | | A Bedene | 3 | 7 | 6 | | | | | | | | |
| | | | | 3 | A Ramos Viñolas | 6 | 5 | 1 | | | | | | | | |
| | | | | | | | | | | | | | A Bedene | 6 | 2 | 6 |
| LL | G Elias | 6 | 6 | | | | | | | | | | F Delbonis | 4 | 6 | 1 |
| SE | R Carballés Baena | 2 | 4 | LL | G Elias | 6$^5$ | 6$^6$ | | | | | | | | | |
| | F Delbonis | 7$^7$ | 6 | | F Delbonis | 7$^7$ | 7$^8$ | | | | | | | | | |
| | F Mayer | 6$^4$ | 4 | | | | | | | F Delbonis | 6 | 7 | | | | |
| WC | C Berlocq | 3 | 3 | | | | | | | G García López | 3 | 5 | | | | |
| | G García López | 6 | 6 | | G García López | 7$^7$ | 1 | 7$^8$ | | | | | | | | |
| | | | | 2 | P Carreño Busta | 6$^5$ | 6 | 6$^6$ | | | | | | | | |

## Qualifying
### Seeds

* Tennys Sandgren (first round)
* Marco Cecchinato (qualified)
* Rogério Dutra Silva (qualified)
* Thomaz Bellucci (qualified)
* Gastão Elias (qualifying competition, lucky loser)
* Casper Ruud (qualifying competition)
* Renzo Olivo (first round)
* Alessandro Giannessi (first round)

### Qualifiers

* Facundo Bagnis
* Marco Cecchinato
* Rogério Dutra Silva
* Thomaz Bellucci

### 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 | Qualifying competition |
| 1 | Tennys Sandgren | 1 | 2 | | | | | | |
| | Facundo Bagnis | 6 | 6 | | | | | | |
| | Facundo Bagnis | 6 | 6 | | | Facundo Bagnis | 6$^7$ | 6 | 6 |
| | | | | | 5 | Gastão Elias | 7$^9$ | 1 | 1 |
| Alt | João Souza | 6 | 3 | 0 | 5 | Gastão Elias | 7$^9$ | 1 | 1 |
| 5 | Gastão Elias | 4 | 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 | | | | |
| | Guido Andreozzi | 4 | 3 | | | | |
| | Guido Andreozzi | 4 | 3 | 2 | Marco Cecchinato | 6 | 7$^7$ |
| | | | | 6 | Casper Ruud | 3 | 6$^4$ |
| | João Domingues | 1 | 3 | 6 | Casper Ruud | 3 | 6$^4$ |
| 6 | Casper Ruud | 6 | 6 | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Rogério Dutra Silva | 6$^9$ | 6 | 2 | | | | |
| Alt | Andrea Collarini | 7$^{11}$ | 3 | 1$^r$ | | | | |
| Alt | Andrea Collarini | 7$^{11}$ | 3 | 1$^r$ | 3 | Rogério Dutra Silva | 7$^7$ | 7$^7$ |
| | | | | | Alt | Guilherme Clezar | 6$^5$ | 6$^5$ |
| Alt | Guilherme Clezar | 7 | 6 | | Alt | Guilherme Clezar | 6$^5$ | 6$^5$ |
| 7 | Renzo Olivo | 5 | 0 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Thomaz Bellucci | 6 | 6 | | | | |
| WC | Juan Ignacio Galarza | 4 | 4 | | | | |
| WC | Juan Ignacio Galarza | 4 | 4 | 4 | Thomaz Bellucci | 6 | 6 |
| | | | | WC | Hernán Casanova | 2 | 4 |
| WC | Hernán Casanova | 7$^7$ | 6 | WC | Hernán Casanova | 2 | 4 |
| 8 | Alessandro Giannessi | 6$^5$ | 4 | | | | |