Celtic midfielder Paddy McCourt says they must be wary of Rangers signing David Healy in today's Scottish Cup tie. Sunderland striker Healy could make his Rangers debut against Celtic after signing for his boyhood heroes until the end of the season just before the transfer window closed.

"There is no secret that David is a big Rangers fan," he said.

"He has been linked with Rangers since I've been at Celtic, that's something that has been going on for a long time.

"So I'm sure he will be delighted that it has finally come off for him."