Tracy Ann Austin Holt (born December 12, 1962) is an American former World No. 1 retired professional tennis player. She won three Grand Slam titles, winning the women's singles title at the US Open in 1979 and 1981, and the mixed doubles title at Wimbledon in 1980. Additionally, she won the WTA Tour Championships in 1980 and the 1981 year end Toyota Championships, both in singles, before a series of injuries cut her career short. Since 1979, she has held the record as youngest ever US Open female singles champion and is the youngest inductee of all time in the International Tennis Hall of Fame. Austin won singles titles on all playing surfaces: clay (both red clay and green clay), indoor carpet, grass, and hard courts.