# 2021 Andalucía Open – Singles

Pablo Carreño Busta defeated Jaume Munar in the final, 6–1, 2–6, 6–4 to win the inaugural Men's Singles tennis title at the 2021 Andalucía Open. Notably, this was the first tournament in ATP history to feature 4 semifinalists from the same nation.
This was the first edition of the tournament, primarily organised due to the cancellation of some tournaments in 2021, due to the COVID-19 pandemic.

## Seeds

The top four seeds received a bye into the second round.
* Pablo Carreño Busta (champion)
* Fabio Fognini (second round)
* Casper Ruud (quarterfinals)
* Albert Ramos Viñolas (semifinals)
* Alejandro Davidovich Fokina (second round)
* Feliciano López (second round)
* Kwon Soon-woo (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 |
| 1 | Pablo Carreño Busta | 6 | 3 | 7$^7$ | | | | | |
| 4 | Albert Ramos Viñolas | 1 | 6 | 6$^5$ | | | | | |
| 4 | Albert Ramos Viñolas | 1 | 6 | 6$^5$ | 1 | Pablo Carreño Busta | 6 | 2 | 6 |
| | | | | | | Jaume Munar | 1 | 6 | 4 |
| WC | Carlos Alcaraz | 6$^4$ | 4 | | | Jaume Munar | 1 | 6 | 4 |
| | Jaume Munar | 7$^7$ | 6 | | | | | | |

### 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 | P Carreño Busta | 7$^7$ | 6 | | | | | | | | | | | |
| Q | B Zapata Miralles | 2 | 3 | | Q | M Vilella Martínez | 6$^2$ | 3 | | | | | | | | | | | |
| Q | M Vilella Martínez | 6 | 6 | | | | | | | 1 | P Carreño Busta | 6 | 6 | | | | | | |
| | F Bagnis | 6 | 7$^7$ | | | | | | | 7 | S-w Kwon | 4 | 0 | | | | | | |
| | F Cerúndolo | 3 | 6$^2$ | | | F Bagnis | 1 | 3 | | | | | | | | | | | |
| WC | H Rune | 3 | 6 | 6$^4$ | 7 | S-w Kwon | 6 | 6 | | | | | | | | | | | |
| 7 | S-w Kwon | 6 | 3 | 7$^7$ | | | | | | | | | | | 1 | P Carreño Busta | 6 | 3 | 7$^7$ |
| | | | | | | | | | | | | | | | 4 | A Ramos Viñolas | 1 | 6 | 6$^5$ |
| | | | | | 4 | A Ramos Viñolas | 6 | 4 | 6 | | | | | | | | | | |
| | L Pouille | 4 | 7$^7$ | 5 | | R Berankis | 3 | 6 | 3 | | | | | | | | | | |
| | R Berankis | 6 | 6$^5$ | 7 | | | | | | 4 | A Ramos Viñolas | 6$^4$ | 7 | 6 | | | | | |
| | N Gombos | 6$^3$ | 6 | 6 | | | | | | | N Gombos | 7$^7$ | 5 | 4 | | | | | |
| | JI Londero | 7$^7$ | 1 | 3 | | N Gombos | 5 | 7$^7$ | 7$^7$ | | | | | | | | | | |
| | R Carballés Baena | 5 | 1 | | 8 | F Delbonis | 7 | 6$^4$ | 6$^1$ | | | | | | | | | | |
| 8 | F Delbonis | 7 | 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 |
| 6 | F López | 6 | 6 | | | | | | | | | | | | | | | |
| | T Daniel | 4 | 4 | | 6 | F López | 6 | 2 | 4 | | | | | | | | | |
| Q | N Milojević | 6$^3$ | 3 | | WC | C Alcaraz | 4 | 6 | 6 | | | | | | | | | |
| WC | C Alcaraz | 7$^7$ | 6 | | | | | | | WC | C Alcaraz | 6 | 6 | | | | | |
| | M Kukushkin | 5 | 3 | | | | | | | 3 | C Ruud | 2 | 4 | | | | | |
| | G Mager | 7 | 6 | | | G Mager | 3 | 2 | | | | | | | | | | |
| | | | | | 3 | C Ruud | 6 | 6 | | | | | | | | | | |
| | | | | | | | | | | | | | | | WC | C Alcaraz | 6$^4$ | 4 |
| 5 | A Davidovich Fokina | 6$^1$ | 6 | 6 | | | | | | | | | | | | J Munar | 7$^7$ | 6 |
| | D Džumhur | 7$^7$ | 2 | 2 | 5 | A Davidovich Fokina | 1 | 3 | | | | | | | | | | |
| | I Ivashka | 6 | 7$^7$ | | | I Ivashka | 6 | 6 | | | | | | | | | | |
| | P Martínez | 3 | 6$^2$ | | | | | | | | I Ivashka | 7$^7$ | 4 | 4 | | | | |
| Q | H Laaksonen | 4 | 1 | | | | | | | | J Munar | 6$^5$ | 6 | 6 | | | | |
| | J Munar | 6 | 6 | | | J Munar | 6 | 6 | | | | | | | | | | |
| | | | | | 2/WC | F Fognini | 2 | 1 | | | | | | | | | | |

## Qualifying
### Seeds

* Evgeny Donskoy (qualifying competition)
* Peter Gojowczyk (first round)
* Antoine Hoang (first round)
* Henri Laaksonen (qualified)
* Bernabé Zapata Miralles (qualified)
* Nikola Milojević (qualified)
* Martin Kližan (first round)
* Lorenzo Giustino (qualifying competition)

### Qualifiers

* Bernabé Zapata Miralles
* Nikola Milojević
* Mario Vilella Martínez
* Henri Laaksonen

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Evgeny Donskoy | 6 | 6 | | | | |
| WC | Leo Borg | 1 | 0 | | | | |
| WC | Leo Borg | 1 | 0 | 1 | Evgeny Donskoy | 1 | 4 |
| | | | | 5 | Bernabé Zapata Miralles | 6 | 6 |
| | Ernests Gulbis | 2 | 1 | 5 | Bernabé Zapata Miralles | 6 | 6 |
| 5 | Bernabé Zapata Miralles | 6 | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Peter Gojowczyk | 2 | 3 | | | | | |
| | Steven Diez | 6 | 6 | | | | | |
| | Steven Diez | 6 | 6 | | | Steven Diez | 5 | 3 |
| | | | | | 6 | Nikola Milojević | 7 | 6 |
| | Alessandro Giannessi | 7$^7$ | 3 | 1$^r$ | 6 | Nikola Milojević | 7 | 6 |
| 6 | Nikola Milojević | 6$^4$ | 6 | 4 | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Antoine Hoang | 2 | 4 | | | | | |
| Alt | Mario Vilella Martínez | 6 | 6 | | | | | |
| Alt | Mario Vilella Martínez | 6 | 6 | Alt | Mario Vilella Martínez | 6 | 3 | 6 |
| | | | | WC | Carlos Gómez-Herrera | 3 | 6 | 3 |
| WC | Carlos Gómez-Herrera | 6 | 6 | WC | Carlos Gómez-Herrera | 3 | 6 | 3 |
| 7 | Martin Kližan | 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 | Henri Laaksonen | 6 | 6$^7$ | 6 | | | | | |
| | Roman Safiullin | 3 | 7$^9$ | 1 | | | | | |
| | Roman Safiullin | 3 | 7$^9$ | 1 | 4 | Henri Laaksonen | 7 | 3 | 6 |
| | | | | | 8 | Lorenzo Giustino | 5 | 6 | 1 |
| Alt | Roberto Marcora | 6$^4$ | 4 | | 8 | Lorenzo Giustino | 5 | 6 | 1 |
| 8 | Lorenzo Giustino | 7$^7$ | 6 | | | | | | |