David de Gea
David de Gea is yet to agree a new deal at Old Trafford Getty Images

David de Gea's move from Manchester United to Real Madrid will be "imminent" as Iker Casillas's future at the Santiago Bernabeu looks all but over, reports in Spain claim.

Casillas's continuity at the Santiago Bernabeu has been under increasing scrutiny in recent days after the Spanish legend reportedly exploded against his own fans during the 2-2 draw against Valencia on Saturday 9 May.

After a number of Real Madrid supporters blamed Casillas for the two goals conceded in the first half of the game by whistling at him every time he touched the ball, the keeper lifted his arm as a sign of irritation and caught by Spanish TV station Cuatro appearing to say: "F***k off."

"P*ss off. You are such a drag. F**k. F**k with the sh*tty whistling. F***k off. P*ss off. It's breaking my balls."

And with De Gea having been earmarked as the top priority to replace the Real Madrid legend at the Santiago Bernabeu since the beginning of the campaign, speculation about Casillas's exit and the United keeper's arrival at Los Blancos has increased in recent days.

Earlier in the season reports claimed that Real Madrid were keen on keeping Casillas for one more season and waiting until the end of De Gea's contract at Old Trafford in summer 2016 to secure the services of the United number one as a free agent.

But according to recent reports in Spain, the difficult situation between Casillas and his own supporters is going to force Real Madrid to advance the De Gea deal to this summer.

Following the Casillas incident at the weekend, Spanish journalist Manolo Lama, from Radio Station Cadena Cope, already claimed that Real Madrid have decided to part ways with the keeper at the end of the current season.

The reports added that should the keeper refuse to leave and decide to fulfil the two years remaining on his contract at the Santiago Bernabeu, the club will try to sign De Gea anyway to be the number one – leaving Casillas on the bench.

And now Catalan newspaper Sport has reported that the United keeper's move is just a matter of time.

"De Gea move to Real Madrid is imminent. Casillas may play his last Real Madrid game as a starter in the Champions League second leg against Juventus," Sport said.

De Gea

"De Gea's signing looks unstoppable after Los Blancos asked him not to renew his contract at United and wait until the end of La Liga and the Champions League. De Gea is yet to respond to United's lucrative offer and it looks he will eventually reject it to join Real Madrid instead."

Sport adds that, as Cope previously reported, Real Madrid will try to sign De Gea even if Casillas stays as the Los Blancos officials are ready to drop him for the number one role and even relegate him to third choice behind Keylor Navas.

Nevertheless and with De Gea having still a one year contract at Old Trafford, Real Madrid will need to agree a fee with Louis van Gaal's side to secure his services this summer.