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WUPPERTAL, GERMANY - AUGUST 01: Raphael van der Vaart of Betis Sevilla challenges Kevin Kampl of Borussia Dortmund during the pre-season friendly match between Borussia Dortmund and Betis Sevilla at Stadium AM ZOO on August 1, 2015 in Wuppertal, Germany. (Photo by Alexandre Simoes/Borussia Dortmund/Getty Images)

WUPPERTAL, GERMANY - AUGUST 01:  Raphael van der Vaart of Betis Sevilla challenges Kevin Kampl  of Borussia Dortmund  during the pre-season friendly match between Borussia Dortmund and Betis Sevilla at Stadium AM ZOO   on August 1, 2015 in Wuppertal, Germany.  (Photo by Alexandre Simoes/Borussia Dortmund/Getty Images)