# 2019 Argentina Open – Singles

Dominic Thiem was the defending champion, but lost to Diego Schwartzman in the semifinals.
Marco Cecchinato won the title, defeating Schwartzman in the final, 6–1, 6–2.

## Seeds

The top four seeds received a bye into the second round.
* Dominic Thiem (semifinals)
* Fabio Fognini (second round)
* Marco Cecchinato (champion)
* Diego Schwartzman (final)
* João Sousa (second round)
* Nicolás Jarry (first round)
* Dušan Lajović (first round)
* Malek Jaziri (first 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 | 4 | 6$^5$ | | | | |
| 4 | Diego Schwartzman | 2 | 6 | 7$^7$ | | | | |
| 4 | Diego Schwartzman | 2 | 6 | 7$^7$ | 4 | Diego Schwartzman | 1 | 2 |
| | | | | | 3 | Marco Cecchinato | 6 | 6 |
| 3 | Marco Cecchinato | 6 | 6 | | 3 | Marco Cecchinato | 6 | 6 |
| | Guido Pella | 4 | 2 | | | | | |

### 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 | Semifinals |
| | | | | | 1 | D Thiem | 6 | 6 | | | | | | | | | | | |
| Q | F Bagnis | 4 | 2 | | | M Marterer | 4 | 4 | | | | | | | | | | | |
| | M Marterer | 6 | 6 | | | | | | | 1 | D Thiem | 4 | 6 | 6 | | | | | |
| Q | M Arévalo | 2 | 1 | | | | | | | | P Cuevas | 6 | 4 | 3 | | | | | |
| | P Cuevas | 6 | 6 | | | P Cuevas | 6 | 7 | | | | | | | | | | | |
| SE | JI Londero | 3 | 4 | | 5 | J Sousa | 4 | 5 | | | | | | | | | | | |
| 5 | J Sousa | 6 | 6 | | | | | | | | | | | | 1 | D Thiem | 6 | 4 | 6$^5$ |
| | | | | | | | | | | | | | | | 4 | D Schwartzman | 2 | 6 | 7$^7$ |
| | | | | | 4 | D Schwartzman | 6 | 2 | 6 | | | | | | | | | | |
| | G Andreozzi | 6 | 6$^5$ | 2 | | A Bedene | 4 | 6 | 2 | | | | | | | | | | |
| | A Bedene | 1 | 7$^7$ | 6 | | | | | | 4 | D Schwartzman | 6 | 7 | | | | | | |
| | A Ramos Viñolas | 6 | 6 | | | | | | | | A Ramos Viñolas | 1 | 5 | | | | | | |
| Q | R Dutra Silva | 3 | 4 | | | A Ramos Viñolas | 3 | 7$^{11}$ | 6 | | | | | | | | | | |
| WC | D Ferrer | 7$^{15}$ | 6 | | WC | D Ferrer | 6 | 6$^9$ | 3 | | | | | | | | | | |
| 8 | M Jaziri | 6$^{13}$ | 3 | | | | | | | | | | | | | | | | |

### 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 |
| 6 | N Jarry | 7$^7$ | 4 | 3 | | | | | | | | | | | | | | |
| Q | L Sonego | 6$^3$ | 6 | 6 | Q | L Sonego | 5 | 1 | | | | | | | | | | |
| | R Carballés Baena | 6 | 6 | | | R Carballés Baena | 7 | 6 | | | | | | | | | | |
| | T Daniel | 1 | 0 | | | | | | | | R Carballés Baena | 6$^3$ | 4 | | | | | |
| | C Garín | 3 | 7 | 6 | | | | | | 3 | M Cecchinato | 7$^7$ | 6 | | | | | |
| WC | F Auger-Aliassime | 6 | 5 | 3 | | C Garín | 6$^4$ | 4 | | | | | | | | | | |
| | | | | | 3 | M Cecchinato | 7$^7$ | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | | 3 | M Cecchinato | 6 | 6 |
| 7 | D Lajović | 3 | 6$^3$ | | | | | | | | | | | | | G Pella | 4 | 2 |
| | L Mayer | 6 | 7$^7$ | | | L Mayer | 4 | 6 | 6$^5$ | | | | | | | | | |
| WC | F Cerúndolo | 6 | 4 | 1 | | G Pella | 6 | 1 | 7$^7$ | | | | | | | | | |
| | G Pella | 3 | 6 | 6 | | | | | | | G Pella | 6$^3$ | 7$^{11}$ | 6 | | | | |
| | J Munar | 6 | 2 | 6 | | | | | | | J Munar | 7$^7$ | 6$^9$ | 1 | | | | |
| | F Delbonis | 2 | 6 | 1 | | J Munar | 4 | 6 | 7 | | | | | | | | | |
| | | | | | 2 | F Fognini | 6 | 4 | 5 | | | | | | | | | |

## Qualifying
### Seeds

* Cameron Norrie (qualifying competition)
* Thiago Monteiro (first round)
* Lorenzo Sonego (qualified)
* Elias Ymer (qualifying competition)
* Hugo Dellien (qualifying competition)
* Marco Trungelliti (first round)
* Casper Ruud (first round)
* Carlos Berlocq (first round)

### Qualifiers

* Rogério Dutra Silva
* Facundo Bagnis
* Lorenzo Sonego
* Marcelo Arévalo

### 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 | Cameron Norrie | 6 | 4 | 7 | | | | | |
| | Andrej Martin | 4 | 6 | 5 | | | | | |
| | Andrej Martin | 4 | 6 | 5 | 1 | Cameron Norrie | 7$^8$ | 6$^3$ | 2 |
| | | | | | | Rogério Dutra Silva | 6$^6$ | 7$^7$ | 6 |
| | Rogério Dutra Silva | 6 | 3 | 6 | | Rogério Dutra Silva | 6$^6$ | 7$^7$ | 6 |
| 7 | Casper Ruud | 2 | 6 | 4 | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Thiago Monteiro | 7$^{10}$ | 4 | 4 | | | | |
| | Facundo Bagnis | 6$^8$ | 6 | 6 | | | | |
| | Facundo Bagnis | 6$^8$ | 6 | 6 | | Facundo Bagnis | 7$^7$ | 6 |
| | | | | | 5 | Hugo Dellien | 6$^5$ | 2 |
| WC | Juan Bautista Otegui | 2 | 2 | | 5 | Hugo Dellien | 6$^5$ | 2 |
| 5 | Hugo Dellien | 6 | 6 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Lorenzo Sonego | 6 | 7 | | | | |
| | Federico Gaio | 4 | 5 | | | | |
| | Federico Gaio | 4 | 5 | 3 | Lorenzo Sonego | 6 | 3 |
| | | | | | Alessandro Giannessi | 4 | 3$^r$ |
| | Alessandro Giannessi | 6 | 6 | | Alessandro Giannessi | 4 | 3$^r$ |
| 6 | Marco Trungelliti | 4 | 1 | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Elias Ymer | 3 | 6 | 7 | | | | | |
| WC | Juan Pablo Ficovich | 6 | 4 | 5 | | | | | |
| WC | Juan Pablo Ficovich | 6 | 4 | 5 | 4 | Elias Ymer | 4 | 6 | 4 |
| | | | | | | Marcelo Arévalo | 6 | 1 | 6 |
| | Marcelo Arévalo | 6 | 6 | | | Marcelo Arévalo | 6 | 1 | 6 |
| 8 | Carlos Berlocq | 4 | 3 | | | | | | |