Which tennis player won ten Grand Slam titles, Betty Stöve or Stan Smith?
Betty Stöve: Betty Stöve (born 24 June 1945) is a Dutch former professional tennis player. Betty Stöve:  She also won ten Grand Slam titles in women's doubles and mixed doubles. Stan Smith: Stanley Roger Smith (born December 14, 1946 in Pasadena, California) is a former world No. 1 American tennis player and two-time Grand Slam singles champion who also, with his partner Bob Lutz, formed one of the most successful doubles teams of all time.
Betty Stöve