Casillas said: "I have a contract with Madrid until 2017 and what I'm thinking about is completing it. Everybody knows Madrid are in my heart and that I'm a White until I die.
"I joined Real Madrid as a child and Madrid is my home."
Casillas also had a message for Madrid fans who might be fearing he could be on his way out of the club, saying: "The fans should be calm, there is nothing at all from Manchester (United) or any other club. I'm from Spain and from Madrid, and that's it."