The London Film Festival has set Valerie Faris and Jonathan Dayton’s Battle Of The Sexes as its American Express Gala. The Emma Stone/Steve Carell-starrer will have its European Premiere on October 7 at London's Odeon Leicester Square, with screenings of the 70s period drama then being held across the UK on October 10. Stone, Andrea Riseborough, Elisabeth Shue, the directors and tennis legend Billie Jean King are expected to attend the October 7 premiere of the Fox Searchl…