Juan Sebastián Cabal Valdés (Spanish pronunciation: ; born 25 April 1986) is a Colombian professional tennis player specialising in doubles. His current ranking in men's doubles is No. 1, and he has also reached World No. 184 in singles. He has won two grand slam doubles titles in his career, in 2017 he won the mixed doubles title at the Australian Open, partnering Abigail Spears of the USA, and two years later he won his first men's doubles grand slam title, winning the 2019 Wimbledon title alongside countryman and regular doubles partner Robert Farah.
The year 2011 is considered as his ATP Tournament and Grand Slam debut, also considered the best year for his performance in the French Open Doubles with Argentine Eduardo Schwank making history for Colombian Tennis, as they defeated the number 1 ranked couple in the semifinals, brothers Mike Bryan and Bob Bryan with partials 7–6 (4), 6–3 and losing the final to Daniel Nestor and Max Mirnyi.