The 27-year-old returns to his former club for the first time tonight as Real Madrid take on the Red Devils in their Champions League last-16 second leg clash.
With the tie tentatively poised at 1-1, Vidic's main concern will be preventing Ronaldo from being at his match-winning best, as two of Europe's most prestigious clubs battle for a place in the quarter-finals.
However, according to the Manchester United defender, the Portuguese international could be lining up alongside him in Sir Alex Ferguson's side next season, with rumours the forward will leave the Santiago Bernabeu this summer.
"It would be a big ask for many reasons," said Vidic. "I would love to see Cristiano here. I could see it.
"He is a United supporter. Even though he left he still follows United and still misses the club and the environment here."
Vidic also talked up Ronaldo's claim as the world's best player, saying that the Real Madrid star is better than Barcelona's Lionel Messi; winner of four consecutive FIFA Ballon d'Or awards.
"They are both great players but, in recent years, Barcelona have won more trophies and I think that is why people have put Ronaldo to one side," added the Serbian skipper.
"The way he plays, he can play in England, he can shoot with his left, his right, he can jump and head the ball. He can dribble, he can do everything.
"I don't say Messi cannot do that but the way Barcelona play suits his style. Ronaldo has been changing games for the last four years for Madrid. Every time he walks on the pitch he wants to score. He has that hunger in every game."