Cristiano Ronaldo has dismissed speculation that he has signed a new contract with Real Madrid, amid reports the Portugal captain is a summer transfer window target for Manchester United and Monaco.

The 28-year-old's future has been the subject of conjecture for a number of months, but Real Madrid president Florentino Perez has remained confident Ronaldo will remain at the Santiago Bernabeu beyond the terms of his current deal.

Perez told Marca on Wednesday he will do all he can to ensure Ronaldo ends his career with Real Madrid, and is confident the player will pen a contract extension before the start of the new season.

Ronaldo, however, has denied suggestions he has already agreed to a contract renewal with Real Madrid, seemingly intensifying speculation that he could leave the club before September's transfer deadline.

"All the news about my renewal with Real Madrid are false," Ronaldo posted on his official Facebook page.

Ronaldo's statement is likely to act as a fillip for Manchester United fans hopeful the Portuguese will return to Old Trafford this summer, with reports claiming the Red Devils are exploring the possibility of signing him.

Manchester United, however, may be contested by Monaco should they formalise their interest in Ronaldo, with the newly promoted Ligue 1 club reported to be planning a €100 million offer for the player.

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