First-team coach John Collins has appealed to those Celtic fans travelling to Italy for their Europa League tie against Inter Milan to be on their best behaviour.
The Scottish champions visit San Siro on Thursday evening with a chance of qualifying for the last 16 following a thrilling 3-3 draw in last week's reverse fixture.
Prior to their departure from Glasgow Airport, Celtic learned that they had been fined for crowd disturbances in their 4-3 group-stage defeat to Dinamo Zagreb in December, but Collins is hopeful that the Bhoys fans will show why they are so admired in Milan.
"We are obviously disappointed. We had 60,000 last week for first leg and it was unbelievable behaviour from every one of them, the atmosphere, and that is what Celtic is all about," he is quoted as saying by Sky Sports News.
"One or two causing problems and hopefully that is the last we hear of it. They are representing a wonderful football club and throughout the years the vast majority of them have been impeccably behaved and we have a great reputation throughout Europe.
"There are one or two who we have to try to weed out and it's vitality important that the fans behave themselves in Milan. They are representing a wonderful football club. Over the years the vast majority of them have been impeccably behaved and earned a great reputation throughout Europe."
John Guidetti's 93rd-minute equaliser at Parkhead ensured that Celtic would take parity to the three-time European champions.
