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STUTTGART, GERMANY - APRIL 21: Bastian Schweinsteiger attends the match between Ana Ivanovic of Serbia and Karolina Pliskova of Czech Republic during Day 4 of the Porsche Tennis Grand Prix at Porsche-Arena on April 21, 2016 in Stuttgart, Germany. (Photo by Dennis Grombkowski/Bongarts/Getty Images)

STUTTGART, GERMANY - APRIL 21:  Bastian Schweinsteiger attends the match between Ana Ivanovic of Serbia and Karolina Pliskova of Czech Republic during Day 4 of the Porsche Tennis Grand Prix at Porsche-Arena on April 21, 2016 in Stuttgart, Germany.  (Photo by Dennis Grombkowski/Bongarts/Getty Images)