All Tennis Players How Many Grand Slams Has Rafael Osuna Won? Rafael Osuna Herrera (15 September 1938 – 4 June 1969), nicknamed “El Pelón” (The Bald), was a former world No. 1 tennis player.Rafael Osuna has won 1 Grand Slam. FacebookTwitterEmail How Many Grand Slams Has Madison Keys Won? How Many Grand Slams Has Jannik Sinner Won? How Many Majors Has John Isner Won?