The England captain faces his old side Everton in a testimonial on Wednesday.
"Paul Scholes is one of the best midfielders of all time. His passing, vision and the way he controlled the tempo of games was incredible.
"Cristiano is a special player and he has gone on to be one of the best in the world.
"Some of the things he used to do in training and then take into games was unbelievable; he'll always be remembered as one of the greats of the game."