Liverpool's German head coach Jurgen Klopp (L) and Liverpool's Serbian assistant manager Zeljko Buvac react from the sidelines during the UEFA Europe League quarter-final, first-leg football match Borussia Dortmund vs Liverpool FC in Dortmund, western Germany on April 7, 2016. / AFP / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images)
