US Open champ, Gerard Butler yell war cry from movie '300'
Serbia's Novak Djokovic and Hollywood actor Gerard Butler yelled the war cry, "This is Sparta," from the actor's 2007 movie '300', after the former won his third US Open title on Sunday. "There are few warriors like this man [Djokovic]. He's been inspired by Leonidas [from '300'] for years so this has become our good luck war cry," Butler wrote.