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HAMBURG, GERMANY - FEBRUARY 18: Referee Christian Dingert gestures to Nicolas Hfler of Freiburg during the Bundesliga match between Hamburger SV and SC Freiburg at Volksparkstadion on February 18, 2017 in Hamburg, Germany. (Photo by Stuart Franklin/Bongarts/Getty Images)

HAMBURG, GERMANY - FEBRUARY 18: Referee Christian Dingert gestures to Nicolas Hfler of Freiburg during the Bundesliga match between Hamburger SV and SC Freiburg at Volksparkstadion on February 18, 2017 in Hamburg, Germany.  (Photo by Stuart Franklin/Bongarts/Getty Images)