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AC Milan's Colombian forward Carlos Bacca (R) challenges Atalanta's Italian midfielder Alberto Grassi during the Serie A football match between AC Milan and Atalanta at the San Siro Stadium in Milan on November 7, 2015. AFP PHOTO / GIUSEPPE CACACE (Photo credit should read GIUSEPPE CACACE/AFP/Getty Images)

AC Milan's Colombian forward Carlos Bacca (R) challenges Atalanta's Italian midfielder Alberto Grassi during the Serie A football match between AC Milan and Atalanta at the San Siro Stadium in Milan on November 7, 2015. AFP PHOTO / GIUSEPPE CACACE        (Photo credit should read GIUSEPPE CACACE/AFP/Getty Images)