King dispatches Riggs in three sets before 30,000 at the Astrodome

Bobby Riggs had spent the summer of 1973 promising that a 55-year-old man could still beat any woman in tennis, and after flattening Margaret Court in May, plenty of people believed him. On September 20, 1973, Billie Jean King, 29, walked into the Houston Astrodome to settle it in front of more than 30,000 spectators and a live international broadcast. King won 6-4, 6-3, 6-3, taking the winner-take-all $100,000 purse without dropping a set. Riggs' claim of male superiority lost with him…