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LONDON - CIRCA 1973: Billy Jean King of the USA returns a shot during the women's singles at the Wimbledon Lawn Tennis Championships circa 1973 at the All England Lawn Tennis and Croquet Club in London, England. King defeated Chris Evert in the finals 6-0, 7-5. (Photo by Focus on Sport/Getty Images)

LONDON - CIRCA 1973:  Billy Jean King of the USA returns a shot during the women's singles at the Wimbledon Lawn Tennis Championships circa 1973 at the All England Lawn Tennis and Croquet Club in London, England. King defeated Chris Evert in the finals 6-0, 7-5. (Photo by Focus on Sport/Getty Images)