United assistant manager Carlos Queiroz, a candidate to replace Luiz Felipe Scolari as Portugal coach, has advised Ronaldo to remain at Old Trafford.
He said: "Manchester United is very special. Because of that we know how to surround Cristiano completely with all the affection and all the attention he deserves.
"However, not speaking is the most sensible course of action at this moment, so that we don't contribute to a less than positive spectacle and so we don't aid those whose interests are difficult to identify."
