GELSENKIRCHEN, GERMANY - FEBRUARY 26: FC Schalke 04 head coach Jens Keller reacts prior to the UEFA Champions League Round of 16 first leg match between Schalke 04 and Real Madrid CF at Veltins-Arena on February 26, 2014 in Gelsenkirchen, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images)