Mendes contacting Spanish clubs on David de Gea's behalf to urge Manchester United into better deal

Powerful agent involved in bringing David de Gea to United continues to push on his client's behalf for more money.

After an initially shaky start at Manchester United, goalkeeper David de Gea has proven himself as a key player at Old Trafford.

His performances have finally been recognised by Spain and the stopper is in line to make his debut in the World Cup warm-up games.

De Gea has been at United three seasons now, and with two years remaining of the five on his contract, this is seen as a pivotal time for him.

SkySports reported in March that De Gea is likely to be offered a new deal, but so far there is no agreement.

De Gea's agent, Jorge Mendes (pictured), is working on his behalf to secure his client a new deal, with The Star reporting two weeks ago that he stands to have his £52,000 per week salary increased to £85,000 but it's very plausible the pair will hold out for more,especially with Wayne Rooney earning £300,000 per week.

Spanish newspaper El Confidencial now report that the matter has taken another twist, with Mendes ready to ratchet up the negotiations by floating the idea of his signature out to Spain's top sides.

Real Madrid will be looking out for a long-term replacement for Iker Casillas while a return to Atletico where Thibaut Courtois' status is at yet unknown, would tempt the 23-year-old.

The paper claim: "The Portuguese (Mendes) has arrived with the promise under the arm of a possible return to the capital of Spain."

De Gea himself is very happy at United, given his desire to extend his deal, evidenced by his comments yesterday he was trying to convince Cesc Fabregas to join him at Old Trafford.

And while it would be a surprise to see him not renew, the involvement of Mendes makes anything possible; and United would be well advised to conclude negotiations as early as they can and tie up the future of one of their most important players before it becomes a big issue.

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