Spain coach Vicente Del Bosque says he is bemused by the treatment Iker Casillas received from Jose Mourinho at Real Madrid.

Casillas is club captain at the Bernabeu, and arguably Madrid’s best ever goalkeeper.

But he only played 19 games for Los Blancos during the 2012-13 season, after falling out with The Special One.

In fact, asked what his biggest regret at the club was when it became clear he was set to leave, Mourinho said it was not dropping Casillas sooner.

But despite his lack of game time, Del Bosque has retained Casillas in his Spain squad for their upcoming friendlies ahead of the Confederations Cup.

And he says he cannot fathom why the World Cup and two-times European Cup winning captain was dropped by Real Madrid.

"I find it hard to believe that Iker dropped out of the [Real] squad," Del Bosque.

"It's hard to believe because I've known him for many years and his career has always been impeccable.

"I have not had the chance to speak to him since the game we played in France, but while it's none of my business and an internal matter for the club I have no reason to believe it is true."

Real Madrid’s current first-choice goalkeeper is Diego Lopez, who admittedly played well when promoted by Mourinho.

However, he does not even feature on Del Bosque’s shortlist for Spain, and it remains to be seen if he will keep his place between the sticks at Madrid, now that Mourinho is gone.