"The impact Sir Alex has had on me is massive. He gave me this big chance to play at the biggest club in the world. He has taught me a lot and I only have thankful words for him," he told MUTV.
"It [Sir Alex's retirement] is not only a loss for the British fans but he has changed football across the world. He has been here for 26 years and made the impossible dream come true.
"And what can I say about Paul Scholes? All the players say the same thing about him - he's an incredible player and team-mate, and the class and talent he has is unbelievable."