All Tennis Players How Many Grand Slams Has Tony Trabert Won? Marion Anthony Trabert (August 16, 1930 – February 3, 2021) was an American amateur world No. 1 tennis champion and long-time tennis author, TV commentator, instructor, and motivational speaker.Tony Trabert has won 5 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?