DORTMUND, GERMANY - APRIL 07: Referee Carlos Velasco Carballo delivers a yellow card during the UEFA Europa League quarter final first leg match between Borussia Dortmund and Liverpool FC at Signal Iduna Park aka Westfalenstadion on April 7, 2016 in Dortmund, Germany. (Photo by Jean Catuffe/Getty Images)
Getty Images

Getty Images Sport Jean Catuffe