Cristiano Ronaldo is set to reject the offer of a contract extension at Real Madrid, according to Spanish newspaper AS.

The Portugal international revealed on 2 September that he is unhappy at the Bernabeu, sparking speculation he could be ready to leave the club after four seasons.

And, according to fresh reports from Spain, Ronaldo will not accept the contract proposal on offer from the La Liga champions - although the decision is not thought to be money motivated.

AS report that Real Madrid are preparing an improved contract for Ronaldo, and will offer him the new deal in the summer, but the article claims Ronaldo will reject the offer because he does not feel supported by the club.

The former-Manchester United star reportedly feels abandoned by the Spanish giants, and was unhappy at the club's limited efforts to back him in his Ballon d'Or nomination.

Still, Madrid remain hopeful that Ronaldo will sign the new deal, which would tie him to the club until 2018, and is reportedly worth between €10m and €15m per year. Lionel Messi, Ronaldo's chief rival for the title of the world's best player, recently signed a new and improved deal at Barcelona, keeping him at the club until 2018.

But, the La Liga champions face a difficult decision if Ronaldo refuses to accept new terms - they could sell him to the highest bidder, or they could keep him for two years and then lose him on a free transfer at the end of his current Madrid contract in 2015.

If they decide to sell, AS report that big-spending French club Paris St Germain would be the most likely destination, but also claim that a return to Manchester United would be Ronaldo's personal choice.

In recent weeks Manchester United boss Sir Alex Ferguson has lavished praise on his former player, while United defender Patrice Evra admitted that he keeps in regular contact with his ex-teammate. The former-United star is set to face his former club for the first time since his £80m move to Madrid when Jose Mourinho's side take on United in the Champions League last-16.

Ronaldo has enjoyed a hugely successful spell in Madrid so far, bagging 169 goals in four years and helping his club to win their first league title since 2008 last season.

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