Coleman said: “We have got a chance 11 versus 11 – but their home record is as good as any of the top sides in Europe.
“We know it is going to be tough, but this season we have beaten Arsenal, although we have lost to some of the bottom sides as well.
“What is most important for me is that we have to compete over 90 minutes – that is all I can ask for going into this game.
“If we go in with self-belief and our sleeves rolled up, anything can happen.”
Coleman added: “(Manchester United boss) Sir Alex Ferguson has come out and said that both United and Chelsea will drop more points – and they will.
“It is possible they could drop points to us in this game, we know that.”