In 'Battle of the Sexes,' King passes a baton to Emma Stone

TORONTO (AP) — Walking through the tunnel to Arthur Ashe Stadium alongside Billie Jean King, Emma Stone gasped at the size of the U.S. Open's main court.

King, of course, was more familiar with the grounds of the tennis center — it's named after her, after all. But as accustomed as Stone is to the spotlight, her playing fields are usually private film sets or more intimate television show audiences. In making "Battle of the Sexes," a new film about King's infamous 1973 showdown with Bobby Riggs (Steve Carell), Stone was often both awed and a little jealous of the stages on which King crusaded for sport and for women's rights. (King helped win equal prize money for women at the U.S. Open that same year.