Iker Casillas
Iker Casillas will honour his contract in MadridGetty

Real Madrid captain Iker Casillas insists he is not going anywhere just yet amid persistent talk of him being replaced by Manchester United's David de Gea this summer.

Casillas, 33, has spent his entire career at Los Blancos but during a year where his form for both club and country has been questioned, talk of a long-term replacement being brought in has heightened.

Given his spectacular form at Old Trafford this season that has seen him shortlisted for the PFA player of the year award, De Gea has been intensely linked with a move to the Santiago Bernabeu to take over from Real's long-serving custodian.

But Casillas insists he will honour the final two years of his contract and is ready battle anyone who stands in his way to retain his number one status.

"I hope to fulfil my contract and a commitment that is signed has to be signed until the end," Casillas told AS after his side booked a place in the semi-finals of the Champions League against Atletico Madrid on 22 April. "But I have to earn it and train myself for it. I will strive and I will fight for the position."

The Spain international adds that even if he is to lose his role in the first team, he still has an important duty to assist the younger players at the club.

He said: "Now I am at an age at which things are seen in a different way, so if I am not the starter, I will have a commitment with the younger ones. Why wouldn't I continue at Madrid if I am not the starting goalkeeper?"

De Gea's contract impasse at Old Trafford has helped fuel talk of a possible return to Spain for the shot stopper. The 24-year-old's current deal at United expires at the end of next season.