Real Madrid coach Carlo Ancelotti has described today's derby defeat by Atletico Madrid as the "worst" that game they have played with him in charge.
Goals from Tiago, Saul Niguez, Antoine Griezmann and Mario Mandzukic gave Atletico a resounding 4-0 triumph at Vicente Calderon for their fourth win over Real in all competitions this season.
An angry Ancelotti told reporters: "It is easy to analyse this game because Atletico were better in every facet of the game. They fought more, had more quality on the ball, had better organisation, everything.
"It is the worst game we have played since I have been coach. We will reflect on it in the coming days with a cool head. We will suffer a lot from this defeat, but we need to change this attitude and avoid it happening in another game in the future.
"We failed at everything, we lost all the tackles, all the high balls. We didn't have one player who played well."
Real remain top of the La Liga table and will seek a response when they face Deportivo La Coruna next weekend.