# 2021 Barcelona Open Banc Sabadell – Doubles

Defending champions Juan Sebastián Cabal and Robert Farah successfully defended their title, defeating Kevin Krawietz and Horia Tecău in the final, 6–4, 6–2, to win the doubles tennis title at the 2021 Barcelona Open. The top seeds did not drop a set en route to their 18th career ATP Tour doubles title together. Krawietz and Tecău were in contention to win their first title as a team.

## Seeds

* Juan Sebastián Cabal / Robert Farah (champions)
* Marcel Granollers / Horacio Zeballos (first round)
* Rajeev Ram / Joe Salisbury (semifinals)
* Wesley Koolhof / Łukasz Kubot (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

### Draw

| First round | First round | First round | First round | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | JS Cabal R Farah | 6 | 6 | | | | | | | | | | | | | | |
| | P-H Herbert N Mahut | 2 | 4 | | 1 | JS Cabal R Farah | 6 | 6 | | | | | | | | | |
| | D Evans N Skupski | 6 | 5 | [13] | | D Evans N Skupski | 3 | 4 | | | | | | | | | |
| | H Kontinen É Roger-Vasselin | 4 | 7 | [11] | | | | | 1 | JS Cabal R Farah | 7 | 6 | | | | | |
| 4 | W Koolhof Ł Kubot | 4 | 1 | | | | | | | J Chardy F Martin | 5 | 1 | | | | | |
| WC | C Alcaraz P Carreño Busta | 6 | 6 | | WC | C Alcaraz P Carreño Busta | | | | | | | | | | | |
| | J Chardy F Martin | 7$^7$ | 6$^4$ | [10] | | J Chardy F Martin | w/o | | | | | | | | | | |
| Q | A Mannarino B Paire | 6$^1$ | 7$^7$ | [8] | | | | | | | | | | 1 | JS Cabal R Farah | 6 | 6 |
| WC | F López M López | 3 | 1 | | | | | | | | | | | | K Krawietz H Tecău | 4 | 2 |
| | I Dodig J Murray | 6 | 6 | | | I Dodig J Murray | 3 | 4 | | | | | | | | | |
| | C Garín G Pella | 0 | 3 | | 3 | R Ram J Salisbury | 6 | 6 | | | | | | | | | |
| 3 | R Ram J Salisbury | 6 | 6 | | | | | | 3 | R Ram J Salisbury | 6 | 3 | [9] | | | | |
| | J Peers L Saville | 6 | 6 | | | | | | | K Krawietz H Tecău | 1 | 6 | [11] | | | | |
| | M Melo J-J Rojer | 1 | 4 | | | J Peers L Saville | 4 | 3 | | | | | | | | | |
| | K Krawietz H Tecău | 7$^7$ | 7$^7$ | | | K Krawietz H Tecău | 6 | 6 | | | | | | | | | |
| 2 | M Granollers H Zeballos | 6$^4$ | 6$^3$ | | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Sander Gillé / Joran Vliegen (first round)
* Marcus Daniell / Philipp Oswald (qualifying competition)

### Qualifiers

* Adrian Mannarino / Benoît Paire

### Qualifying draw

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Sander Gillé Joran Vliegen | 4 | 4 | | | | | |
| | Adrian Mannarino Benoît Paire | 6 | 6 | | | | | |
| | Adrian Mannarino Benoît Paire | 6 | 6 | | Adrian Mannarino Benoît Paire | 1 | 7$^7$ | [10] |
| | | | | 2 | Marcus Daniell Philipp Oswald | 6 | 6$^0$ | [7] |
| WC | David Marrero Tommy Robredo | 3 | 3 | 2 | Marcus Daniell Philipp Oswald | 6 | 6$^0$ | [7] |
| 2 | Marcus Daniell Philipp Oswald | 6 | 6 | | | | | |