The Italian is convinced that the Portguese star will commit his future to the club but remained tight-lipped over negotiations for Gareth Bale
Real Madrid boss Carlo Ancelotti claims it is "certain" that Cristiano Ronaldo will sign a new contract at the club this summer.
The 28-year-old, whose current deal expires in 2015, has seen his future shrouded in doubt in recent weeks as speculation of a potential return to Manchester United began to surface.
It emerged on Tuesday that the club are preparing to announce the Portugal sensation's new deal after they have finalised negotiations for Tottenham star Gareth Bale, and Ancelotti has voiced his own confidence that Ronaldo will stay at Santiago Bernabeu.
"I am confident Cristiano will renew," he told a press conference. "I think he is comfortable here and I don't think it will be a problem.
"I don't know about a date because that is an issue between the player and the club, but one thing is certain: Cristiano will renew his contract."
The 54-year-old declined to discuss any potential deal for Bale, however, insisting he did not wish to disrespect opposite number Andre Villas-Boas.
"I would rather not speak about it [Bale's transfer] because it would be disrespectful to Andre Villas-Boas," said Ancelotti.
"I do not want to talk about the player. The team is strong, young and I am very happy with the current squad."