Coleman told evertontv: "This club is the fans' life and they'd give anything to see us win a trophy, just like we would. But we have to be professional about it. Anything can happen in the cups - look at Bradford in the League Cup knocking big teams out.
"We have to be on guard all the time. First and foremost, we need to do a professional job this week in training and prepare right for the game against Wigan."