Juan Sebastián Cabal Valdés (Spanish pronunciation: [xwan seβasˈtjaŋ kaˈβal];[a] born 25 April 1986)[1] is a Colombian former professional tennis player.

2011 is considered as Cabal ATP and Grand Slam debut, and also considered the best year for his doubles performance at the 2011 French Open with Argentine Eduardo Schwank making history for Colombian tennis, as they defeated the top ranked pair in the semifinals, brothers Mike and Bob Bryan, and then lost the final to Daniel Nestor and Max Mirnyi.

In the second round, they lost in three sets to the couple formed by American Michael Russell and Mikhail Kukushkin Kazakhstan.

He also reached a seventh final in his home country's ATP 250 event, the 2014 Claro Open Colombia in Bogotá with compatriot Nicolás Barrientos.

He then reached his first Grand Slam semifinal since 2011 at the 2017 French Open with Farah, where they lost to Michael Venus and Ryan Harrison.

In May 2018, at the 2018 Italian Open, Cabal and Farah won their first Masters 1000 title against Pablo Carreño Busta and João Sousa.

In 2019, the most successful year for Cabal and Farah, they won their first ever Grand Slam men's doubles title at Wimbledon in 2019, defeating Frenchmen Nicolas Mahut and Édouard Roger-Vasselin in a thrilling five-set match that required four tie-break sets; this victory helped Farah and Cabal to both ascend to world No.

[3] Before the COVID-19 pandemic led to the suspension of the season, Cabal competed with Jaume Munar in the Australian Open, where they lost in the second round.

[citation needed] They won their first title of the year in Dubai, defeating Nikola Mektić and Mate Pavić in the final.

At the 2021 French Open, Cabal and Farah were seeded second and reached the semifinals, losing to eventual champions Pierre-Hugues Herbert and Nicolas Mahut.

[7] In the grass season, they suffered a second round loss at Queen's Club, before a semifinal appearance at Eastbourne, where they lost to Joe Salisbury and Rajeev Ram, who also defeated them in the quarterfinals at Wimbledon.

[8] Cabal and Farah represented Colombia at the Tokyo Olympics where they reached the quarterfinals, before losing to the New Zealand pairing of Marcus Daniell and Michael Venus.

[9] However, they captured their third title of the year in Vienna, avenging their earlier defeats to Salisbury and Ram by beating them in the final in straight sets.