Billie Jean King
Person
Tennis, United States. King won 39 Grand Slam titles and, while still playing, founded the Women's Tennis Association in 1973, the year her threat of a boycott helped make the US Open the first major to pay men and women equally. She also founded the Women's Sports Foundation and World TeamTennis, and the Fed Cup was renamed the Billie Jean King Cup in her honour in 2020.
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