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ZAGREB, CROATIA - SEPTEMBER 16: Arsenal's Olivier Giroud is shown a 2nd yellow card by referee Ovidiu Hategan during the UEFA Champions League Group Stage match between GNK Dinamo Zagreb and Arsenal at the Maksimir Stadium on September 16, 2015 in Zagreb, Croatia. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images)

ZAGREB, CROATIA - SEPTEMBER 16: Arsenal's Olivier Giroud is shown a 2nd yellow card by referee Ovidiu Hategan during the UEFA Champions League Group Stage match between GNK Dinamo Zagreb and Arsenal at the Maksimir Stadium on September 16, 2015 in Zagreb, Croatia. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images)