Doyle thinks the midfielder will have a long and successful international career.
"He hasn't looked out of place at all since he came in," Doyle said.
"I hope he does well tomorrow because he has been impressive in training and he has told me about his two cruciates on the same knee.
"I have never had a serious injury like that so I can't imagine what it's like mentally, never mind physically, to come back from that.
"That he has come back shows his character, what he is all about, and shows he will have no problem in dealing with what comes his way in the Ireland team."