All Tennis Players How Many Grand Slams Has Ashley Cooper Won? Ashley John Cooper AO (15 September 1936 – 22 May 2020) was an Australian tennis player who played between 1953 and 1968. He was ranked as the world’s No. 1 amateur player during the years of 1957 and 1958.Ashley Cooper Has Won 4 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?