It was a match made in heaven: she was the darling of American tennis, an outspoken activist against sexism in sport and society; he was the charismatic, fast-talking, hustling chauvinist showman. Yet their unlikely 'courtship', in the midst of a social revolution, captured the imaginations of people around the world, helping to empower a generation that changed women's sport forever.

It is September 20th, 1973, the Houston Astrodome is packed with 30,000 screaming fans. They are here to witness the most important, bizarre and downright fascinating tennis match of all time. One man versus one woman, best of five sets, a winner takes all prize of $100,000 and a global audience of 50 million people. The competitors: Billie Jean King, 29, reigning Wimbledon champion, determined to win the right to a level playing field; and Bobby Riggs, a 55 year old former Wimbledon champion, and self-confessed male chauvinist.

Combining scintillating match footage with contemporary news reports, stylised dramatic reconstructions and interviews with key players, journalists, fans, campaigners, academics and historians, The Battle of the Sexes is an entertaining look at one of the most important sporting events of the 20th century.