Battle-of-Sexes Tennis Match On this day, in 1973 Billie Jean King won a much hyped nationally televised match held at the Houston Astrodome, between 55-year-old Bobby Riggs and 29-year-old Billie Jean King. September 20, 1973 Sport: Tennis Trivia What Are the Five Events That Make Up the Modern Olympic Pentathon? Which Nations Won the Gold, Silver and Bronze Medals the Last Time Baseball Was an Olympic Sport? sports in this article Tennis tags in this article Fan On This Day SportsEngine