DORTMUND, GERMANY - APRIL 04:  The fans of Borussia Dortmund in action prior to the Bundesliga match between Borussia Dortmund and Hamburger SV at Signal Iduna Park on April 04, 2017 in Dortmund, Germany.  (Photo by Alexandre Simoes/Borussia Dortmund/Getty Images)
DORTMUND, GERMANY - FEBRUARY 18:  The fans of Borussia Dortmund in action prior to the Bundesliga match between Borussia Dortmund and VfL Wolfsburg at Signal Iduna Park on February 18, 2017 in Dortmund, Germany.  (Photo by Alexandre Simoes/Borussia Dortmund/Getty Images)
MOENCHENGLADBACH, GERMANY - APRIL 22: The fans of Borussia Dortmund in action during the Bundesliga match between Borussia Moenchengladbach and Borussia Dortmund at the Borussia-Park on April 22, 2017 in Moenchengladbach, Germany.  (Photo by Alexandre Simoes/Borussia Dortmund/Getty Images)
MOENCHENGLADBACH, GERMANY - APRIL 22: The fans of Borussia Dortmund in action during the Bundesliga match between Borussia Moenchengladbach and Borussia Dortmund at the Borussia-Park on April 22, 2017 in Moenchengladbach, Germany.  (Photo by Alexandre Simoes/Borussia Dortmund/Getty Images)