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.[1]