It was a boring little battle for second-best this weekend as big-name new releases Leatherheads and Nim's Island were locked in a dead heat for the silver to unexpected hit 21's second week of gold. Though actual grosses won't be released until later today, studio estimates shows George Clooney's period sports film/screwball romantic comedy (the presumed top dog this weekend) just edging out the Jodie Foster family flick, with $13.4 million and $13.3 million takes, respectively. Surprisingly though, neither managed to bump last week's top earner, 21, out of the top spot, where it settled in with $15.1 million.