# 2021 Chile Open – Singles

Cristian Garín defeated Facundo Bagnis in the final, 6–4, 6–7$^{(3–7)}$, 7–5 to capture the men's singles tennis title at the 2021 Chile Open.
Thiago Seyboth Wild was the defending champion, but chose not to defend his title.

## Seeds

The top four seeds received a bye into the second round.
* Cristian Garín (champion)
* Benoît Paire (second round)
* Pablo Andújar (second round)
* Laslo Đere (quarterfinals)
* Frances Tiafoe (second round)
* Salvatore Caruso (first round)
* Federico Coria (second round)
* Federico Delbonis (semifinals)

## 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 | Final |
| 1 | Cristian Garín | 6 | 6 | | | | | |
| | Daniel Elahi Galán | 4 | 3 | | | | | |
| | Daniel Elahi Galán | 4 | 3 | 1 | Cristian Garín | 6 | 6$^3$ | 7 |
| | | | | | Facundo Bagnis | 4 | 7$^7$ | 5 |
| | Facundo Bagnis | 7 | 6 | | Facundo Bagnis | 4 | 7$^7$ | 5 |
| 8 | Federico Delbonis | 5 | 3 | | | | | |

### 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 | C Garín | 6 | 6 | | | | | | | | |
| | J Kovalík | 1 | 6 | 4 | Q | A Tabilo | 2 | 2 | | | | | | | | |
| Q | A Tabilo | 6 | 0 | 6 | | | | | 1 | C Garín | 6 | 6 | | | | |
| | J Sousa | 4 | 1 | | | | | | Q | JP Varillas | 4 | 4 | | | | |
| Q | JP Varillas | 6 | 6 | | Q | JP Varillas | 6 | 7$^7$ | | | | | | | | |
| | G Mager | 6 | 6$^4$ | 6$^4$ | 7 | F Coria | 4 | 6$^2$ | | | | | | | | |
| 7 | F Coria | 4 | 7$^7$ | 7$^7$ | | | | | | | | | 1 | C Garín | 6 | 6 |
| | | | | | | | | | | | | | | DE Galán | 4 | 3 |
| | | | | | 3 | P Andújar | 1 | 6$^7$ | | | | | | | | |
| | DE Galán | 7$^7$ | 3 | 7 | | DE Galán | 6 | 7$^9$ | | | | | | | | |
| | D Altmaier | 6$^2$ | 6 | 5 | | | | | | DE Galán | 7$^{10}$ | 6 | | | | |
| WC | G Lama | 5 | 2 | | | | | | | R Carballés Baena | 6$^8$ | 3 | | | | |
| WC | JM Cerúndolo | 7 | 6 | | WC | JM Cerúndolo | 2 | 0 | | | | | | | | |
| | R Carballés Baena | 6 | 7$^7$ | | | R Carballés Baena | 6 | 6 | | | | | | | | |
| 6 | S Caruso | 4 | 6$^5$ | | | | | | | | | | | | | |

### 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 Tiafoe | 7$^9$ | 6$^7$ | 7$^9$ | | | | | | | | | | | | | | |
| WC | N Jarry | 6$^7$ | 7$^9$ | 6$^7$ | 5 | F Tiafoe | 6$^3$ | 6$^2$ | | | | | | | | | | |
| | F Bagnis | 6$^4$ | 6 | 6 | | F Bagnis | 7$^7$ | 7$^7$ | | | | | | | | | | |
| | M Cecchinato | 7$^7$ | 2 | 3 | | | | | | | F Bagnis | 4 | 6 | 6 | | | | |
| | P Sousa | 6 | 6 | | | | | | | 4 | L Đere | 6 | 3 | 3 | | | | |
| | L Mayer | 2 | 4 | | | P Sousa | 7 | 5 | 3 | | | | | | | | | |
| | | | | | 4 | L Đere | 5 | 7 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | | | F Bagnis | 7 | 6 |
| 8 | F Delbonis | 6 | 6$^5$ | 6 | | | | | | | | | | | 8 | F Delbonis | 5 | 3 |
| | J Munar | 4 | 7$^7$ | 4 | 8 | F Delbonis | 6 | 6 | | | | | | | | | | |
| SE | F Cerúndolo | 1 | 2 | | | A Martin | 0 | 3 | | | | | | | | | | |
| | A Martin | 6 | 6 | | | | | | | 8 | F Delbonis | 6 | 6 | | | | | |
| Q | H Rune | 6 | 6 | | | | | | | Q | H Rune | 3 | 3 | | | | | |
| Q | S Báez | 3 | 2 | | Q | H Rune | 6 | 6 | | | | | | | | | | |
| | | | | | 2 | B Paire | 2 | 3 | | | | | | | | | | |

## Qualifying
### Seeds

* Alejandro Tabilo (qualified)
* Juan Pablo Varillas (qualified)
* Emilio Gómez (second round)
* João Domingues (first round)
* Mario Vilella Martínez (second round)
* João Menezes (second round)
* Andrea Collarini (first round)
* Tomás Martín Etcheverry (second round)

### Qualifiers

* Alejandro Tabilo
* Juan Pablo Varillas
* Holger Rune
* Sebastián Báez

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Alejandro Tabilo | 6 | 6 | | | | | | | | | | |
| | Nicolás Álvarez | 4 | 3 | | | | | | | | | | |
| | Nicolás Álvarez | 4 | 3 | | 1 | Alejandro Tabilo | 7$^7$ | 6 | | | | | |
| | | | | | | Pedro Sakamoto | 6$^0$ | 4 | | | | | |
| Alt | Rafael Matos | 3 | 1 | | | Pedro Sakamoto | 6$^0$ | 4 | | | | | |
| | Pedro Sakamoto | 6 | 6 | | | | | | | | | | |
| | Pedro Sakamoto | 6 | 6 | | | | | | | 1 | Alejandro Tabilo | 7$^7$ | 6 |
| | | | | | | | | | | Alt | Agustín Velotti | 6$^1$ | 1 |
| Alt | Agustín Velotti | 6 | 6 | | | | | | | | | | | Alt | Agustín Velotti | 6$^1$ | 1 |
| WC | Daniel Antonio Núñez | 4 | 3 | | | | | | | | | | |
| WC | Daniel Antonio Núñez | 4 | 3 | | Alt | Agustín Velotti | 7 | 4 | 6 | | | | |
| | | | | | 8 | Tomás Martín Etcheverry | 5 | 6 | 3 | | | | |
| | Marcelo Tomás Barrios Vera | 4 | 6 | 4 | 8 | Tomás Martín Etcheverry | 5 | 6 | 3 | | | | |
| 8 | Tomás Martín Etcheverry | 6 | 2 | 6 | | | | | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Juan Pablo Varillas | 4 | 7 | 7$^7$ | | | | | | | | | |
| | Christian Lindell | 6 | 5 | 6$^3$ | | | | | | | | | |
| | Christian Lindell | 6 | 5 | 6$^3$ | 2 | Juan Pablo Varillas | 6 | 6 | | | | | |
| | | | | | | Geoffrey Blancaneaux | 2 | 2 | | | | | |
| | Camilo Ugo Carabelli | 6 | 2 | 2 | | Geoffrey Blancaneaux | 2 | 2 | | | | | |
| | Geoffrey Blancaneaux | 3 | 6 | 6 | | | | | | | | | |
| | Geoffrey Blancaneaux | 3 | 6 | 6 | | | | | | 2 | Juan Pablo Varillas | 6 | 6 |
| | | | | | | | | | | | Felipe Meligeni Alves | 4 | 1 |
| | Guilherme Clezar | 4 | 2 | | | | | | | | | | | Felipe Meligeni Alves | 4 | 1 |
| | Felipe Meligeni Alves | 6 | 6 | | | | | | | | | | |
| | Felipe Meligeni Alves | 6 | 6 | | | Felipe Meligeni Alves | 3 | 7$^7$ | 7$^7$ | | | | |
| | | | | | 5 | Mario Vilella Martínez | 6 | 6$^5$ | 6$^3$ | | | | |
| | Lukáš Klein | 4 | 2 | | 5 | Mario Vilella Martínez | 6 | 6$^5$ | 6$^3$ | | | | |
| 5 | Mario Vilella Martínez | 6 | 6 | | | | | | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Emilio Gómez | 6 | 6 | | | | | | | | | | | |
| | Facundo Mena | 2 | 3 | | | | | | | | | | | |
| | Facundo Mena | 2 | 3 | | 3 | Emilio Gómez | 3 | 6 | 1 | | | | | |
| | | | | | WC | Holger Rune | 6 | 4 | 6 | | | | | |
| WC | Holger Rune | 7$^7$ | 2 | 6 | WC | Holger Rune | 6 | 4 | 6 | | | | | |
| | Gonçalo Oliveira | 6$^3$ | 6 | 2 | | | | | | | | | | |
| | Gonçalo Oliveira | 6$^3$ | 6 | 2 | | | | | | WC | Holger Rune | 4 | 6 | 6 |
| | | | | | | | | | | | Renzo Olivo | 6 | 3 | 4 |
| | Carlos Gómez-Herrera | 6 | 4 | 4 | | | | | | | | | | | Renzo Olivo | 6 | 3 | 4 |
| | Renzo Olivo | 2 | 6 | 6 | | | | | | | | | | |
| | Renzo Olivo | 2 | 6 | 6 | | Renzo Olivo | 6$^4$ | 6 | 6 | | | | | |
| | | | | | | Hernán Casanova | 7$^7$ | 2 | 3 | | | | | |
| | Hernán Casanova | 4 | 6 | 6 | | Hernán Casanova | 7$^7$ | 2 | 3 | | | | | |
| 7 | Andrea Collarini | 6 | 3 | 2 | | | | | | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | João Domingues | 4 | 2 | | | | | | | | | | | |
| WC | Nicolás Kicker | 6 | 6 | | | | | | | | | | | |
| WC | Nicolás Kicker | 6 | 6 | | WC | Nicolás Kicker | 6 | 6 | | | | | | |
| | | | | | | Thomaz Bellucci | 0 | 4 | | | | | | |
| | Elliot Benchetrit | 2 | 2 | | | Thomaz Bellucci | 0 | 4 | | | | | | |
| | Thomaz Bellucci | 6 | 6 | | | | | | | | | | | |
| | Thomaz Bellucci | 6 | 6 | | | | | | | WC | Nicolás Kicker | 6 | 4 | 1 |
| | | | | | | | | | | | Sebastián Báez | 3 | 6 | 6 |
| | Sebastián Báez | 6 | 6$^5$ | 6 | | | | | | | | | | | Sebastián Báez | 3 | 6 | 6 |
| | Orlando Luz | 2 | 7$^7$ | 2 | | | | | | | | | | |
| | Orlando Luz | 2 | 7$^7$ | 2 | | Sebastián Báez | 7$^8$ | 2 | 6 | | | | | |
| | | | | | 6 | João Menezes | 6$^6$ | 6 | 2 | | | | | |
| WC | Michel Vernier | 2 | 3 | | 6 | João Menezes | 6$^6$ | 6 | 2 | | | | | |
| 6 | João Menezes | 6 | 6 | | | | | | | | | | | |