Atletico Madrid midfielder Koke says Real Madrid fans should show Iker Casillas greater respect.

The Real captain has been jeered by Real supporters this season.

"With Iker we all know him, I wouldn't like to be in his skin after what has happened at Real Madrid and the Spanish national team. It is a true injustice. A week ago we saw the goodbye to Gerrard at Liverpool and now you see "Casillas, who is a symbol, who is being whistled and it is unfair," said Koke.

Former Atleti teammate David de Gea is expected to quit Manchester United for Real.

Koke added: "David is a good friend of mine and at the moment he is a player of Manchester. If someday he is a Madrid player I'll have an opinion."