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Sergio Ramos is ready to leave Real MadridReuters

Real Madrid have told Manchester United they would need to pay €90m (£64m, $100.9m) to secure the services of Sergio Ramos after the La Liga giants rejected a €50m offer from the Premier League side to clinch the deal, according to Spanish newspaper AS.

It claims Real Madrid want United to break the world record fee for a centre-back set in 2014 by the sale of David Luiz, from Chelsea to Paris Saint-Germain, for around £40m, as reported by BBC Sport.

AS points out that having made a first formal bid of €50m for the defender earlier in June, Louis van Gaal's side can "go up to €70m" to secure the services of the 29-year-old centre-back. The Dutch boss has earmarked his signing as a top priority to fill the void left by the departures of Rio Ferdinand and Nemanja Matic in 2014.

The Spain international has two years remaining on his contract at the Santiago Bernabeu and a release clause of €200m.

But AS reported on Sunday 21 June that he was ready to force his exit from Rafael Benitez's side after being locked in negotiations over a new deal for months.

The Spanish defender met with Real Madrid official Jose Angel Sanchez at the club's training ground on 24 June to express his intentions to leave the club while urging them to listen to offers as Manchester United are interested in securing his services.

AS claims Real Madrid are ready to fulfil Ramos's desires should United match their €90m demands.

The Spanish publication says club president Florentino Perez is keen to sell the centre-back to fund the move of his new Galactico – as he already did in previous summers by selling the likes of Mesut Ozil, Gonzalo Higuain and Angel di Maria to bring in Gareth Bale and James Rodriguez. This year, according to AS, Manchester City star Sergio Aguero would be the ace up his sleeve.