Real Madrid captain Iker Casillas asked fans to forgive them after their thrashing by Atletico Madrid.
Atletico thrashed Real 4-0 at the Vicente Calderon.
Casillas said: "Analysing the game is a mistake. Atlético were better than us, they beat is all over the park. They were superior and we have to congratulate them because they played a perfect game. We were lacking in every aspect of play.
"We leave here with heavy hearts, but we have to correct today's mistakes so they don't repeat themselves again in the future. We also have to ask the fans for forgiveness because we are the last people who want to give this image of ourselves".