Celtic's tifo. Very cool. pic.twitter.com/WZSUzL6YUE— Bleacher Report UK (@br_uk) October 1, 2013
In another corner of Celtic Park, Hoops fans showed their colours and also displayed a disturbing banner featuring Lionel Messi:
Celtic fans hail Messi and Barcelona. pic.twitter.com/B1nZNzZE90— Bleacher Report UK (@br_uk) October 1, 2013
Those who've been will tell you they are few better places to be on a big European night.