Barcelona, PSG, Porto and Bayern Munich all in action
Bayern Munich fans cheer for their team during the UEFA Champions League second-leg quarter-final football match Bayern Munich v FC Porto in Munich, southern Germany on April 21, 2015.CHRISTOF STACHE/AFP / Getty Images
Porto's Diego Reyes, Bayern's Robert Lewandowski and Porto's Maicon Roque, from left, go for a header during the soccer Champions League quarter-final second leg match between Bayern Munich and FC Porto.Matthias Schrader/The Associated Press
Porto's forward Ricardo Quaresma, left, vies with Bayern Munich's Spanish defender Juan Bernat.CHRISTOF STACHE/AFP / Getty Images
Barcelona's Andres Iniesta runs with the ball during the Champions League quarter-final second leg soccer match between FC Barcelona and Paris Saint Germain.Emilio Morenatti/The Associated Press
Porto's Brazilian midfielder Casemiro fouls Bayern Munich's Polnish striker Robert Lewandowski.GUENTER SCHIFFMANN/AFP / Getty Images
Bayern Munich's Spanish midfielder Thiago Alcantara scores the 1-0 goal past Porto's Brazilian goalkeeper Fabiano.GUENTER SCHIFFMANN/AFP / Getty Images
Barcelona's Brazilian forward Neymar da Silva Santos Junior, left, scores a goal during the UEFA Champions League quarter-finals second leg match FC Barcelona vs Paris Saint-Germain at the Camp Nou stadium in Barcelona.LLUIS GENE/AFP / Getty Images
Bayern Munich's Thiago Alcantara in action with FC Porto's Ivan Marcano.Michael Dalder/Reuters
Bayern Munich's Juan Bernat, left, in action with FC Porto's Oliver Torres.Kai Pfaffenbach/Reuters
Bayern's Xabi Alonso, left, is challenged by Porto's Hector Herrera, during the soccer Champions League quarter-final second leg match between Bayern Munich and FC Porto at the Allianz Arena in Munich, southern Germany.Michael Probst/The Associated Press
Bayern's Jerome Boateng, left, celebrates with his teammate Rafinha after he scored his side's second goal.Matthias Schrader/The Associated Press
Bayern's Robert Lewandowski, centre, scores his side's third goal during the soccer Champions League quarter-final second leg match between Bayern Munich and FC Porto.Matthias Schrader/The Associated Press
Robert Lewandowski of Bayern Muenchen celebrates with teammates after scoring his side’s third goal.Dennis Grombkowski
Bayern's head coach Pep Guardiola, left, instructs defender Holger Badstuber.Matthias Schrader/The Associated Press
Barcelona's midfielder Sergio Busquets slides to tackle Paris Saint-Germain's Italian midfielder Marco Verratti.QUIQUE GARCIA/AFP / Getty Images
Barcelona's Uruguayan forward Luis Suarez, left, vies with Paris Saint-Germain's Brazilian defender David Luiz.QUIQUE GARCIA/AFP / Getty Images
Barcelona's midfielder Andres Iniesta drives the ball through PSG defenders during the UEFA Champions League quarter-finals second leg football match FC Barcelona vs Paris Saint-Germain.QUIQUE GARCIA/AFP / Getty Images
Neymar celebrates with Dani Alves after scoring the second goal for Barcelona.Albert Gea/Reuters