DORTMUND, GERMANY - OCTOBER 04: Referee Felix Zwayer reacts during the Bundesliga match between Borussia Dortmund and Hamburger SV at Signal Iduna Park on October 4, 2014 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images)
DORTMUND, GERMANY - OCTOBER 04: Referee Felix Zwayer reacts during the Bundesliga match between Borussia Dortmund and Hamburger SV at Signal Iduna Park on October 4, 2014 in Dortmund, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images)