Did Juan Sebastián Cabal and Paul Haarhuis both win Grand Slam doubles titles at tennis?
Juan Sebastián Cabal:  In 2017 he won the Australian Open Mixed Doubles partnering Abigail Spears of the USA. Paul Haarhuis:  He won six Grand Slam men's doubles titles, five with Jacco Eltingh and one with Yevgeny Kafelnikov.
yes