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DORTMUND, GERMANY - SEPTEMBER 26: Christiano Ronaldo (C) of Real Madrid CF attends a training session ahead of the UEFA Champions League group F soccer match between Borussia Dortmund and Real Madrid CF at Signal Iduna Park stadium in Dortmund, Germany on September 26, 2016. (Photo by Leon Kuegeler/Anadolu Agency/Getty Images)

DORTMUND, GERMANY - SEPTEMBER 26: Christiano Ronaldo (C) of Real Madrid CF attends a training session ahead of the UEFA Champions League group F soccer match between Borussia Dortmund and Real Madrid CF at Signal Iduna Park stadium in Dortmund, Germany on September 26, 2016.  (Photo by Leon Kuegeler/Anadolu Agency/Getty Images)