Real Madrid will be made to pay astronomical figures if they firm up interest in David de Gea, who does not have a buyout clause in his Manchester United contract.

Reports in Spain suggested Real believe De Gea could be signed for £52million after the goalkeeper demanded a clause be inserted into the four-year deal signed in 2015.

But it is understood a fee of more than double Gianluigi Buffon's £33m world-record transfer to Juventus would be required if he ever did leave Old Trafford.

Manchester United goalkeeper David de Gea does not have a release clause in his contract

That looks unlikely this summer, given De Gea is contracted for another two seasons, with United owning the option of another on top of that.

United are relaxed about his situation and their No 1 is understood to be very happy in the North West.

Jose Mourinho made sure to keep his No 1 close when taking over from Louis van Gaal and appointed De Gea's former mentor Emilio Alvarez as the club's goalkeeping coach.

He is happy at United, aided by the hiring of his mentor Emilio Alvarez as goalkeeping coach

Alvarez was crucial to the Spaniard's development at Atletico Madrid and De Gea is thought to be more engaged during training sessions at Carrington than under Van Gaal's team. The pair have regularly undertaken extra sessions together, despite the intense calendar.

The 26-year-old enjoys an excellent relationship with Mourinho - also represented by Jorge Mendes - and thrives off his manager's anger in the dressing room following disappointing draws.

He shares the same vision as the Portuguese, having completely lost faith in Van Gaal's ability to close the gap on their rivals last season.

The Real Madrid target also enjoys a good relationship with United manager Jose Mourinho

Even though United still face a battle for the top four, De Gea is thought to be confident Mourinho is guiding the club in the right direction.

De Gea would consider a move if United missed out on Champions League qualification for the second year running, coupled with Real Madrid tabling an absurd offer which would be too huge to reject by his club.

But he is not mulling over his future and remains content with life in Manchester, with his family not hankering for De Gea's return to Spain.

Real do want more Spanish players in their team and therefore the national team's No 1 would appeal, yet their sights have not definitely been fixed on De Gea, with Chelsea's Thibaut Courtois and AC Milan teenager Gianluigi Donnarumma still options.

But Real are keen to add more Spanish players to their squad in the summer window