Emma Stone played tennis "every day for three months" in preparation for 'Battle of the Sexes'. The 28-year-old actress portrays the 73-year-old professional tennis player in the production, which is based on the sportswoman's 1973 match against Bobby Riggs, and although the red head used to practice the sport as a child she was forced to train solidly with former tennis ace Vincent Spadea prior to picking up a racket in the upcoming movie. Speaking to the Daily Mail newspaper, Emma said: "I was very much a novice. We played every day for three months, which was nothing compared to a lifetime for Billie Jean." Emma also had sessions with Billie, who likened her movements on the court to dancing.