Martina Navratilova
Navratilova had won the title in 1978 and 1979, and went on to win it again in each consecutive year until 1987 and again in 1990. She also won the doubles title in 1976 with Chris Evert, in 1979 with Billie Jean King, and in 1981-5 and in 1986 with Pam Shriver.