Cristiano Ronaldo
Ronaldo advised to see out the remaining 18 months on his Real Madrid deal, reports suggest. (Reuters)

Cristiano Ronaldo has reportedly been told to see out the remainder of his contract at Real Madrid to strengthen his hopes of one day returning to Manchester United.

The Portuguese international had 18 months remaining on his lucrative deal at the Bernabeu, recently declaring that reports of an extension were wide of the mark amid speculation that he may leave the club this summer.

With the forward unwilling to confirm his future to Los Blancos, the free-spending Monaco and Paris Saint Germain have been linked with moves, being perhaps the only clubs in European football capable of making an offer staggering enough to force a sale.

While the romantic idea of United bringing the 28-year-old back to Old Trafford after four years has been touted, the Premier League champions are simply not able to compete financially with the Ligue 1 duo.

However, it has been suggested that Ronaldo would only consider leaving Madrid for United and The Independent report that Ronaldo has been told by his advisors that he must resist a summer move and see out the remainder of his contract with the La Liga giants, if he wishes to make an emotional return to Old Trafford.

While United would be expected to pay an extraordinary signing on fee coupled with a staggering wage package, the club would avoid paying any transfer fee, which would likely call for the club to break their current transfer record.

Should his contract impasse with his current employers remain, Ronaldo will be able to discuss a move to other clubs in January 2015, where the forward will be approaching his 30th birthday.

In the meantime, Real are likely to continue their efforts of securing the forward's future as they look to dislodge Barcelona at the summit of Spanish football.

While a move to Monaco, where the player would likely become the world's richest player in the tax free principality, would undeniably by Ronaldo's most lucrative option this summer, the club have just regained their place in the top flight of French football with Champions League football at least another season away.