McCann suffered a medial knee ligament damage during their 3-1 win over Sunderland on Saturday.
“Chris has suffered a bad injury and I would expect him to be out for a minimum of two to three months,” bemoaned Coyle.
“He has damaged his medial ligament. It’s very unfortunate and a body blow for him.
“That’s where my thoughts are because whenever he has been available he has been in my team.
“I think the world of him, both as a player and as a lad and the good thing is he is at such a young age he will come back better and stronger for it.”
