Players remove tennis balls thrown by Dortmund fans from the pitch during the DFB Cup Quarter Final match between VfB Stuttgart and Borussia Dortmund...
{"Image ImageDescription": "STUTTGART, GERMANY - FEBRUARY 09:  Players remove tennis balls thrown by Dortmund fans from the pitch during the DFB Cup Quarter Final match between VfB Stuttgart and Borussia Dortmund at Mercedes-Benz Arena on February 9, 2016 in Stuttgart, Germany.  (Photo by Alex Grimm/Bongarts/Getty Images)", "Image Copyright": "2016 Getty Images"}