Argentina

Manchester City's Sergio Aguero, left, of Argentina, is challenged by Chelsea's Branislav Ivanovic, right, of Serbia, during the first half of an exhibition soccer match on Thursday, May 23, 2013, at Busch Stadium in St. Louis. (AP Photo/Jeff Roberson)

Manchester City's Sergio Aguero, left, of Argentina, is challenged by Chelsea's Branislav Ivanovic, right, of Serbia, during the first half of an exhibition soccer match on Thursday, May 23, 2013, at Busch Stadium in St. Louis. (AP Photo/Jeff Roberson)