Champions League

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Players check on Atletico's Diego Costa, center, after he injured himself during a first leg quarterfinal Champions League soccer match between Barcelona and Atletico Madrid at the Camp Nou stadium in Barcelona, Spain, Tuesday April 1, 2014. (AP Photo/Emilio Morenatti)

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Barcelona's Lionel Messi, centre tries to get past Atletico's Filipe Luis, left and Oliver Torres during a first leg quarterfinal Champions League soccer match between Barcelona and Atletico Madrid at the Camp Nou stadium in Barcelona, Spain, Tuesday April 1, 2014. (AP Photo/Manu Fernandez)

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Barcelona's Andres Iniesta, left tries a shot on goal during a first leg quarterfinal Champions League soccer match between Barcelona and Atletico Madrid at the Camp Nou stadium in Barcelona, Spain, Tuesday April 1, 2014. (AP Photo/Manu Fernandez)

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Atletico's Diego, left, shoots to score during a first leg quarterfinal Champions League soccer match between Barcelona and Atletico Madrid at the Camp Nou stadium in Barcelona, Spain, Tuesday April 1, 2014. (AP Photo/Manu Fernandez)

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Barcelona's Neymar celebrates after scoring his sides first goal during a first leg quarterfinal Champions League soccer match between Barcelona and Atletico Madrid at the Camp Nou stadium in Barcelona, Spain, Tuesday April 1, 2014. (AP Photo/Emilio Morenatti)

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Manchester United's Rio Ferdinand, left, congratulates Nemanja Vidic after scoring the opening goal during the Champions League quarterfinal first leg soccer match between Manchester United and Bayern Munich at Old Trafford Stadium, Manchester, England, Tuesday, April 1, 2014.(AP Photo/Jon Super)

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Manchester United's Nemanja Vidic, second left, celebrates with his teammates after scoring the opening goal during the Champions League quarterfinal first leg soccer match between Manchester United and Bayern Munich at Old Trafford Stadium, Manchester, England, Tuesday, April 1, 2014.(AP Photo/Jon Super)

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Bayern's Bastian Schweinsteiger celebrates scoring his side's first goal during the Champions League quarterfinal first leg soccer match between Manchester United and Bayern Munich at Old Trafford Stadium, Manchester, England, Tuesday, April 1, 2014.(AP Photo/Jon Super)

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Bayern's Bastian Schweinsteiger, second left, celebrates with his teammates after scoring their side's first goal during the Champions League quarterfinal first leg soccer match between Manchester United and Bayern Munich at Old Trafford Stadium, Manchester, England, Tuesday, April 1, 2014.(AP Photo/Jon Super)