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MADRID, SPAIN - APRIL 27: Referee Mark Clattenburg shows a yellow card to Manuel Neuer of Bayern Munich (1) during the UEFA Champions League semi final first leg match between Club Atletico de Madrid and FC Bayern Muenchen at Vincente Calderon on April 27, 2016 in Madrid, Spain. (Photo by David Ramos/Getty Images)

MADRID, SPAIN - APRIL 27:  Referee Mark Clattenburg shows a yellow card to Manuel Neuer of Bayern Munich (1) during the UEFA Champions League semi final first leg match between Club Atletico de Madrid and FC Bayern Muenchen at Vincente Calderon on April 27, 2016 in Madrid, Spain.  (Photo by David Ramos/Getty Images)