see more

Atletico Madrid's Croatian forward Mario Mandzukic (R) bleeds as he argues with the referee during the UEFA Champions League quarter final first leg football match Atletico de Madrid vs Real Madrid CF at the Vicente Calderon stadium in Madrid on April 14, 2015. AFP PHOTO / PIERRE-PHILIPPE MARCOU (Photo credit should read PIERRE-PHILIPPE MARCOU/AFP via Getty Images)

Atletico Madrid's Croatian forward Mario Mandzukic (R) bleeds as he argues with the referee during the UEFA Champions League quarter final first leg football match Atletico de Madrid vs Real Madrid CF at the Vicente Calderon stadium in Madrid on April 14, 2015.      AFP PHOTO / PIERRE-PHILIPPE MARCOU        (Photo credit should read PIERRE-PHILIPPE MARCOU/AFP via Getty Images)