Spain's Iker Casillas wary of David De Gea competition ahead of Euro 2016

Spain captain Iker Casillas has said that he faces tough competition for his place from Manchester United's David De Gea with their country's goalkeeping spot still undecided ahead of the summer's European Championship in France.

Over the last two years La Roja coach Vicente del Bosque has rotated his two senior goalkeepers, with De Gea impressing again in last Thursday's 1-1 friendly draw in Italy after starting the final Euro 2016 qualifier when Spain won 1-0 in Ukraine.

Casillas has made some high-profile mistakes for his club Porto this season, but he did make a number of excellent saves in Sunday's 0-0 friendly draw in Romania -- and has now kept a clean sheet in each of his last eight international appearances.

The Euro 2008, World Cup 2010 and Euro 2012 winning captain told El Larguero radio show that, unlike with fellow veteran Gianluigi Buffon's situation with Italy, there was lots of competition for the Spain No. 1 jersey.

"I'm [almost] 35 and [De Gea] is 25," Casillas said. "He has the world in front of him and he has longer to go than I do. He has things that I don't have, and vice versa. It is a luxury to have goalkeepers like De Gea.

"Other national teams do not have this competition. We are in good hands here with Spain. There is Sergio Rico, Adrian... We are relaxed. Buffon does not have such competition with Italy, but in Spain it is different."

Casillas has now kept 101 clean sheets in 166 caps, with that being a record number of international games played by any European.

He said he was aware of the statistics that he was achieving, and also the media criticism he had to deal with as his international career drew to a close.

"You think about [the records] as you are still bringing something [to the team]," he said. "I am aware I do not have five, nor three, nor two years left with Spain. It could be not even one.

"Here things are seen in a different way, and you must be honest with yourself. I have been here 16 years and maybe I should think it's not the best for me.

I don't know if [retirement] will be this year or next year. Football cannot throw me out, but a moment will come when I must decide. Neither can four journalists throw me out."