Billie Jean King: Emma Stone and Steve Carell star in film

A film about the 1973 tennis match between Billie Jean King, aged 29, against 55-year-old Bobby Riggs is released next month.

Battle of the Sexes is being screened at the London Film Festival and stars Emma Stone and Steve Carell.

Watched by 90 million people around the world, King's match win is considered a milestone in public acceptance of women's tennis.

David Sillito reports.