Ronaldo’s future at Real Madrid has been the source of constant speculation since the Portugal forward revealed that he was “unhappy” at the Bernabéu due to professional reasons back in September.
Both the 28-year-old and Madrid coach Jose Mourinho have been linked with summer moves to cash-rich Ligue 1 side Paris Saint-Germain.
And Ferguson does not expect the former Old Trafford hero to make a return to the Premier League club any time soon.
“I don’t think there’s anything, as far as I’m aware, that would encourage me to think he would come back here. I don’t think there’s anything in that at all,” said Ferguson.
“He has got two years left on his contract. It could be to do with the fact that negotiations are going on for a new contract. I think maybe his agent is playing the game, though I’m not prepared to comment on that.”
Ferguson’s Red Devils host Real Madrid in the second leg of their Champions League last-16 clash on Tuesday, with the tie finely poised at 1-1.
And the United boss admits that Ronaldo, who left England for Spain in 2009, is their star man.
He added: “Real have a lot of good players, but it’s quite right to think Ronaldo is their best.
“He’s much better now than when he left United. He’s mature now. He’s 28 and at the peak of his career. From 28 to 32 or 33, with the fitness he has, you expect him to play at his peak.”