Real defeated Racing 3-1, with skipper Raul scoring twice, and Casillas said at the final whistle: "I look back not with nostalgia but with pride. Obviously, it is not easy playing for Real Madrid for eight years, where I have experienced good and bad times.
"If I look back, I made my debut at 18 years of age and now it seems to me crazy, but at that moment it did not seem to me anything unusual."
On Raul's two goals, Casillas added: "I am convinced if he continues this form he will be selected by Spain. A player of his quality can offer a lot to the national team and I want him to return."