O’Neill admits it will be difficult to contain Rooney in their Premier League clash with United on Wednesday.
“He’s playing brilliantly and as I said he’s a brilliant footballer and has been for quite some considerable time now,” he said.
“You could see that in his very, very early days at Everton and he is definitely maturing into a wonderful player.
“He’s got a fantastic attitude as well and I think that is almost as important as his ability and he will be hard to handle.
“But we’ve got one or two players ourselves in terms of having ability that will cause Manchester United a few problems.”
