DORTMUND, GERMANY - SEPTEMBER 16: Wojciech Szczesny, Alexis Sanchez and Per Mertesacker of Arsenal walk off looking dejected during the UEFA Champions League Group D match between Borussia Dortmund and Arsenal at Signal Iduna Park on September 16, 2014 in Dortmund, Germany. (Photo by Friedemann Vogel/Bongarts/Getty Images)
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