Portugal's manager is quoted in The Sun:
"The basic education stage of his career is ending and I know Cristiano is ready for a change of atmosphere.
"Barcelona would hugely enjoy having Cristiano in their team because he would complement Ronaldinho perfectly - they have different characteristics.
"For Cristiano, the Barcelona climate would be important - most days are sunny and it's hardly ever cold like England.
"That gives a player all the motivation he needs to train and play."
Scolari, however, believes a move to Madrid would be a bad move.
"Cristiano needs to move somewhere where the team is an integral part of the club - not somewhere where the system is based on individual 'heroes' or 'stars'.
"Moving to a club where there are four or five 'stars' who do their own thing is unworkable."
But Ronaldo's agent Jorge Mendes says the lad wants a new deal at United.
"It's normal that half the world is asking after Cristiano because every game he is delivering exhibition performances.
"Manchester United have repeated their intention not to sell him, and I would do the same if I was a United director.
"It's no secret there is interest from Real Madrid and Barcelona. For us, the matter does not exist and what we are negotiating is the renewal of his contract."