Madrid: Real Madrid captain Iker Casillas slammed his side's performance after they let a two-goal lead slip to lose 4-2 at Real Sociedad on Sunday.
"What happened was very unusual, especially after the first 15 minutes. After that everything was negative, we were horrible in every facet," he said.
"We can't lose a game in this way. We have to accept the defeat and the criticism and learn from what happened today."