In the 1970s, tennis player Billie Jean King threw down the gauntlet for gender equality in an epic tennis match against self-proclaimed chauvinist Bobby Riggs, hailed as the Battle of the Sexes. David Rubenstein tells us how this tennis match changed the world in a fact-filled history minute. Billie Jean had convinced the U.S. Open that male and female competitors should receive equal prize money, and when she defeated Bobby Riggs in the match he had initiated, the battle of the sexes in this sport was won.