Tensions are peaking before tonight’s Champions League showdown. Atletico Madrid filed a formal UEFA complaint after Arsenal fans launched pyrotechnics outside their London hotel at 1:30 AM.

This psychological warfare attempt has triggered a security probe, putting immense pressure on Arsenal. With the aggregate tied at 1-1, tactical discipline is critical as both squads battle for a spot in the final.

This psychological warfare attempt has triggered a security probe, putting immense pressure on Arsenal. With the aggregate tied at 1-1, tactical discipline is critical as both squads battle for a spot in the final.