Sergio Ramos believes he can play at the highest level for five more years but admits there has been no breakthrough over a new contract at Real Madrid.

Reports in Spain have claimed Ramos will leave Madrid at the end of the season, when his current deal expires. A recent offer from Madrid was said by Spanish media to be worth 10 per cent less than his existing agreement.

The 34-year-old centre-back has been linked with Paris Saint-Germain and there appears to be a significant chance of him opting to move elsewhere after 16 seasons with the Bernabeu giants.

Whether he signs a new deal with Los Blancos or decides to depart, Ramos – who has not played since January after suffering a knee injury – is in no doubt he can perform on the biggest stage for years to come.

"There is a lot of uncertainty," he told reporters on Thursday. "I wish I could say something, but there is nothing new.

"I was only thinking about coming back from injury and finishing the season in the best possible way.

"There is nothing new about the renewal. I guarantee that when there is, I will be the first to report it. But now I am calm. Now I am focused on savoring the year.

"I can perform three, four or five more years, if my body supports me and the injuries respect me.

"I can be at the highest level. I work hard for it and my mentality will always be there. I make mistakes, but I learn from everyone. I've been honest and I've always done my best."

Ramos also defended his former Madrid team-mate Cristiano Ronaldo after the Portuguese superstar came in for criticism following Juventus' early Champions League exit this week.

Juve were eliminated from Europe's elite club competition by Porto at the last-16 stage on Tuesday, going out on away goals after the tie finished 4-4 on aggregate after extra time at the Allianz Stadium.

Sergio Oliveira scored the decisive goal late on from a free-kick that went straight through the Juve wall, with Ronaldo turning his back on the effort.

Former Bianconeri boss Fabio Capello singled out Ronaldo, while ex-president Giovanni Cobolli Gigli suggested Juve should never have spent €100million to sign the forward in 2018.

Ramos, though, has backed Ronaldo and hopes Madrid can avoid a similar fate to Juve when they take on Atalanta in the second leg of their last-16 tie next week, the LaLiga side holding a 1-0 advantage.

"He is the flagship of Juventus," Ramos added. "You think of Juve and you think of Cristiano.

"If a bad streak comes, we only talk about the captain and the coach. It's something you have to stay away from. Cris makes a difference.

"Nothing guarantees success. Any team can beat you in the Champions League. Barca fell yesterday, Juventus the day before. It could happen to anyone, but hopefully not us."