# 2021 Córdoba Open – Singles

Cristian Garín was the defending champion, but chose not to defend his title.
Juan Manuel Cerúndolo won the title, defeating Albert Ramos Viñolas in the final 6–0, 2–6, 6–2. Cerúndolo, who started the week ranked 335th and went through qualifying, became the first player to win a tournament on his ATP Tour debut since Santiago Ventura in 2004.

## Seeds

The top four seeds received a bye into the second round.
* Diego Schwartzman (quarterfinals)
* Benoît Paire (quarterfinals)
* Miomir Kecmanović (second round)
* Guido Pella (withdrew)
* Albert Ramos Viñolas (final)
* Dominik Koepfer (first round)
* Thiago Monteiro (quarterfinals)
* 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 |
| 5 | Albert Ramos Viñolas | 7 | 5 | 6 | | | | | |
| Q | Facundo Bagnis | 5 | 7 | 3 | | | | | |
| Q | Facundo Bagnis | 5 | 7 | 3 | 5 | Albert Ramos Viñolas | 0 | 6 | 2 |
| | | | | | Q | Juan Manuel Cerúndolo | 6 | 2 | 6 |
| Q | Juan Manuel Cerúndolo | 6 | 4 | 6 | Q | Juan Manuel Cerúndolo | 6 | 2 | 6 |
| | Federico Coria | 4 | 6 | 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 Schwartzman | 6 | 6 | | | | | | | | | | | |
| | H Dellien | 2 | 6 | 1 | | M Cecchinato | 2 | 2 | | | | | | | | | | | |
| | M Cecchinato | 6 | 4 | 6 | | | | | | 1 | D Schwartzman | 1 | 6 | 3 | | | | | |
| Q | TM Etcheverry | 6 | 7$^7$ | | | | | | | 5 | A Ramos Viñolas | 6 | 4 | 6 | | | | | |
| | A Martin | 3 | 6$^4$ | | Q | TM Etcheverry | 6 | 6$^5$ | 5 | | | | | | | | | | |
| | JI Londero | 6 | 2 | 2 | 5 | A Ramos Viñolas | 2 | 7$^7$ | 7 | | | | | | | | | | |
| 5 | A Ramos Viñolas | 4 | 6 | 6 | | | | | | | | | | | 5 | A Ramos Viñolas | 7 | 5 | 6 |
| | | | | | | | | | | | | | | | Q | F Bagnis | 5 | 7 | 3 |
| | | | | | Q | MT Barrios Vera | 6 | 2 | 3 | | | | | | | | | | |
| | DE Galán | 2 | 6 | 3 | | J Kovalík | 4 | 6 | 6 | | | | | | | | | | |
| | J Kovalík | 6 | 1 | 6 | | | | | | | J Kovalík | 1 | 2 | | | | | | |
| Q | F Bagnis | 6 | 6 | | | | | | | Q | F Bagnis | 6 | 6 | | | | | | |
| WC | N Kicker | 1 | 4 | | Q | F Bagnis | 6 | 7 | | | | | | | | | | | |
| | P Sousa | 4 | 4 | | 8 | F Delbonis | 4 | 5 | | | | | | | | | | | |
| 8 | F Delbonis | 6 | 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 | Semifinals |
| 7 | T Monteiro | 6 | 6 | | | | | | | | | | | | | | | | |
| LL | J Menezes | 3 | 3 | | 7 | T Monteiro | 6 | 6 | | | | | | | | | | | |
| | R Carballés Baena | 6 | 6 | | | R Carballés Baena | 3 | 4 | | | | | | | | | | | |
| | J Sousa | 3 | 1 | | | | | | | 7 | T Monteiro | 2 | 6 | 3 | | | | | |
| Q | JM Cerúndolo | 7 | 7$^7$ | | | | | | | Q | JM Cerúndolo | 6 | 2 | 6 | | | | | |
| | T Seyboth Wild | 5 | 6$^3$ | | Q | JM Cerúndolo | 6$^3$ | 7 | 6 | | | | | | | | | | |
| | | | | | 3 | M Kecmanović | 7$^7$ | 5 | 2 | | | | | | | | | | |
| | | | | | | | | | | | | | | | Q | JM Cerúndolo | 6 | 4 | 6 |
| 6 | D Koepfer | 1 | 4 | | | | | | | | | | | | | F Coria | 4 | 6 | 2 |
| | F Coria | 6 | 6 | | | F Coria | 1 | 6 | 6 | | | | | | | | | | |
| WC | F Cerúndolo | 6$^3$ | 6 | 6 | WC | F Cerúndolo | 6 | 2 | 4 | | | | | | | | | | |
| | G Mager | 7$^7$ | 1 | 4 | | | | | | | F Coria | 6 | 6 | | | | | | |
| | J Munar | 7 | 6$^5$ | 4 | | | | | | 2 | B Paire | 3 | 2 | | | | | | |
| WC | N Jarry | 5 | 7$^7$ | 6 | WC | N Jarry | 2 | 4 | | | | | | | | | | | |
| | | | | | 2 | B Paire | 6 | 6 | | | | | | | | | | | |

## Qualifying
### Seeds

* Facundo Bagnis (qualified)
* Leonardo Mayer (first round)
* Sumit Nagal (first round)
* Juan Pablo Varillas (second round)
* Emilio Gómez (first round)
* Guido Andreozzi (first round)
* João Domingues (first round)
* Mario Vilella Martínez (first round)

### Qualifiers

* Facundo Bagnis
* Tomás Martín Etcheverry
* Marcelo Tomás Barrios Vera
* Juan Manuel Cerúndolo

### Lucky loser

* João Menezes

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Facundo Bagnis | 6 | 4 | 6 | | | | | | | | |
| | Thiago Agustín Tirante | 3 | 6 | 4 | | | | | | | | |
| | Thiago Agustín Tirante | 3 | 6 | 4 | 1 | Facundo Bagnis | 7$^7$ | 6 | | | | |
| | | | | | | Andrea Collarini | 6$^5$ | 3 | | | | |
| | Hernán Casanova | 2 | 6$^3$ | | | Andrea Collarini | 6$^5$ | 3 | | | | |
| | Andrea Collarini | 6 | 7$^7$ | | | | | | | | | |
| | Andrea Collarini | 6 | 7$^7$ | | | | | | 1 | Facundo Bagnis | 6 | 6 |
| | | | | | | | | | | Pedro Sakamoto | 2 | 4 |
| | Guilherme Clezar | 4 | 4 | | | | | | | | | | Pedro Sakamoto | 2 | 4 |
| | Renzo Olivo | 6 | 6 | | | | | | | | | |
| | Renzo Olivo | 6 | 6 | | | Renzo Olivo | 2 | 5 | | | | |
| | | | | | | Pedro Sakamoto | 6 | 7 | | | | |
| | Pedro Sakamoto | 3 | 6 | 7$^7$ | | Pedro Sakamoto | 6 | 7 | | | | |
| 5 | Emilio Gómez | 6 | 1 | 6$^5$ | | | | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Leonardo Mayer | 6$^1$ | 7$^{11}$ | 3 | | | | | | |
| | Tomás Martín Etcheverry | 7$^7$ | 6$^9$ | 6 | | | | | | |
| | Tomás Martín Etcheverry | 7$^7$ | 6$^9$ | 6 | Tomás Martín Etcheverry | 7 | 6 | | | |
| | | | | | Christian Lindell | 5 | 2 | | | |
| | Facundo Mena | 1 | 0$^r$ | | Christian Lindell | 5 | 2 | | | |
| | Christian Lindell | 6 | 0 | | | | | | | |
| | Christian Lindell | 6 | 0 | | | | | Tomás Martín Etcheverry | 7 | 7 |
| | | | | | | | | Ernesto Escobedo | 5 | 5 |
| | Ernesto Escobedo | 7$^7$ | 4 | 6 | | | | | | | Ernesto Escobedo | 5 | 5 |
| | Lukáš Klein | 6$^4$ | 6 | 1 | | | | | | |
| | Lukáš Klein | 6$^4$ | 6 | 1 | Ernesto Escobedo | 6 | 6 | | | |
| | | | | | Felipe Meligeni Alves | 4 | 1 | | | |
| | Felipe Meligeni Alves | 6 | 6 | | Felipe Meligeni Alves | 4 | 1 | | | |
| 7 | João Domingues | 2 | 2 | | | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Sumit Nagal | 4 | 6 | 3 | | | | | | | |
| | Facundo Díaz Acosta | 6 | 2 | 6 | | | | | | | |
| | Facundo Díaz Acosta | 6 | 2 | 6 | Facundo Díaz Acosta | 6 | 3 | 2 | | | |
| | | | | | Camilo Ugo Carabelli | 4 | 6 | 6 | | | |
| WC | Mariano Kestelboim | 0 | 4 | | Camilo Ugo Carabelli | 4 | 6 | 6 | | | |
| | Camilo Ugo Carabelli | 6 | 6 | | | | | | | | |
| | Camilo Ugo Carabelli | 6 | 6 | | | | | | Camilo Ugo Carabelli | 6$^3$ | 6$^4$ |
| | | | | | | | | | Marcelo Tomás Barrios Vera | 7$^7$ | 7$^7$ |
| | Marcelo Tomás Barrios Vera | 6 | 6 | | | | | | | | | Marcelo Tomás Barrios Vera | 7$^7$ | 7$^7$ |
| | Nicolás Álvarez | 1 | 2 | | | | | | | | |
| | Nicolás Álvarez | 1 | 2 | | Marcelo Tomás Barrios Vera | 6 | 6 | | | | |
| | | | | | Agustín Velotti | 3 | 4 | | | | |
| | Agustín Velotti | 6 | 6 | | Agustín Velotti | 3 | 4 | | | | |
| 8 | Mario Vilella Martínez | 3 | 4 | | | | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Juan Pablo Varillas | 6$^3$ | 6 | 6 | | | | | | | |
| WC | Matías Franco Descotte | 7$^7$ | 0 | 0 | | | | | | | |
| WC | Matías Franco Descotte | 7$^7$ | 0 | 0 | 4 | Juan Pablo Varillas | 6$^7$ | 3 | | | |
| | | | | | | Juan Manuel Cerúndolo | 7$^9$ | 6 | | | |
| | Juan Manuel Cerúndolo | 6 | 6 | | | Juan Manuel Cerúndolo | 7$^9$ | 6 | | | |
| WC | Fermín Tenti | 0 | 4 | | | | | | | | |
| WC | Fermín Tenti | 0 | 4 | | | | | | Juan Manuel Cerúndolo | 6 | 6 |
| | | | | | | | | | João Menezes | 4 | 4 |
| | João Menezes | 6 | 7$^7$ | | | | | | | | | João Menezes | 4 | 4 |
| WC | Guido Iván Justo | 3 | 6$^4$ | | | | | | | | |
| WC | Guido Iván Justo | 3 | 6$^4$ | | | João Menezes | 6 | 6 | | | |
| | | | | | | Carlos Gómez-Herrera | 1 | 1 | | | |
| | Carlos Gómez-Herrera | 6 | 7 | | | Carlos Gómez-Herrera | 1 | 1 | | | |
| 6 | Guido Andreozzi | 3 | 5 | | | | | | | | |