Dundee United manager Peter Houston believes his players can take confidence from their last Tannadice encounter with Celtic as they approach Sunday's Clydesdale Bank Premier League match with Neil Lennon's men.
The Tangerines defeated the champions 1-0 on Tayside back in May on their way to clinching a Europa League qualifying place.
Now United will attempt to make it back-to-back wins over the Parkhead club in the televised meeting and Houston believes they can draw inspiration from last season.
Houston said: "We beat Celtic towards the end of last season which shows it can be done. We weren't brilliant that day but we got the early goal and held on for the three points.
"That's what you have to do at times. To beat Celtic what you have to hope for is that they have an off day and you go about your business properly.
"We're under no illusions about how tough it will be though as Celtic will be looking for a good result going into the Barcelona game. But we'll go out to try and get a positive result as we do in every other game and see where it takes us."
Houston hopes the big game atmosphere can bring out the best in his players ahead of the lunchtime kick-off.
He said: "There should be a good crowd and it's always one the United fans savour when Celtic come to town. They're normally very good games and hopefully this one is no different. We've been doing better in the league recently which is something we obviously want to continue doing."
United will hand a late fitness test to captain Jon Daly who hurt his calf in their midweek Scottish Communities League Cup defeat by Hearts.