All Tennis Players How Many Grand Slams Has William Clothier Won? William ‘Bill’ Jackson Clothier (September 27, 1881 – September 4, 1962) was an American tennis player.William Clothier 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?
