All Tennis Players How Many Grand Slams Has William Renshaw Won? William Charles Renshaw (3 January 1861 – 12 August 1904) was a British tennis player.William Renshaw has won 7 Grand Slams. FacebookTwitterEmail How Many Grand Slams Has Madison Keys Won? How Many Grand Slams Has Jannik Sinner Won? How Many Majors Has John Isner Won?