UEFA opens disciplinary proceedings against Arsenal and Cologne

The visitors were issued with 3,000 tickets, but around 20,000 Cologne fans are believed to have made the journey to London.

UEFA has opened disciplinary proceedings following the crowd trouble which overshadowed Thursday night's Europa League match between Arsenal and Cologne at the Emirates Stadium.

The Group H tie, in which Arsenal eventually ran out as 3-1 winners, was delayed by an hour as ticketless Cologne fans looked to gain entry to the ground.