"I am sure he is looking to improve," Carrick said.
"He's getting on, isn't he? But look at Ryan Giggs. What he did on Wednesday was incredible. He goes from not playing for a bit to finishing a game like that - it sets an example to everyone.
"They say you are just getting into your peak at 28. If Wayne wants to can carry on playing on for a long time yet I am sure he will improve - and he is playing well at the moment."
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