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GELSENKIRCHEN, GERMANY - APRIL 01: Head coach Markus Weinzierl of Schalke discusses with referee Felix Zwayer after the Bundesliga match between FC Schalke 04 and Borussia Dortmund at Veltins-Arena on April 1, 2017 in Gelsenkirchen, Germany. (Photo by Lars Baron/Bongarts/Getty Images)

GELSENKIRCHEN, GERMANY - APRIL 01:  Head coach Markus Weinzierl of Schalke discusses with referee Felix Zwayer after the Bundesliga match between FC Schalke 04 and Borussia Dortmund at Veltins-Arena on April 1, 2017 in Gelsenkirchen, Germany.  (Photo by Lars Baron/Bongarts/Getty Images)