She was a woman tennis player and she beat Bobby Riggs, a man tennis player.
From my side it should be Chris Evert
Kathy Rinaldi is the youngest ever woman to enter the pro circuit in tennis. She was just 14 years old when she began playing on the Women's Tennis Association circuit.
Rajna Swaminathan, and she is also the youngest player.
Chris Evert. The American who has won the french open 7 times. (1974,1975,1979,1980,1983,1985 and then her last in 1986).
Evonne Goolagong (Cawley)