Former Middlesbrough defender David Wheater could have secured a victory near the end but scuffed his shot wide of the post.
Nevertheless Coyle was pleased with the way Wheater had performed and said: "It was a terrific debut. He looked very accomplished and was very dominant in the air but we all know that."
Bolton strikers Kevin Davies and Johan Elmander are going through a barren patch and got some advice from Coyle a former striker himself.
He said: "When you're having a spell like this as a striker you have to keep banging on the door and eventually it will fly open. I have no fears that will happen.
"Both teams had chances and we had two gilt opportunities but Wigan defended for their lives."