DORTMUND, NORTH RHINE-WESTPHALIA - APRIL 07: Head coach Juergen Klopp of Liverpool (L) greets Dortmund's CEO Hans-Joachim Watzke prior to the UEFA Europa League quarter final first leg match between Borussia Dortmund and Liverpool at Signal Iduna Park on April 7, 2016 in Dortmund, Germany. (Photo by Boris Streubel/Getty Images)