Madrid- Champions Atletico Madrid upset Real Madrid's title challenge as they extended their unbeaten run over their city rivals to six matches. Tiago put the hosts ahead with a right-footed shot which Real goalkeeper Iker Casillas failed to hold.
Midfielder Saul Niguez then doubled the lead moments later with a spectacular overhead kick.
Antoine Griezmann poked home a third goal from close range before Mario Mandzukic headed the fourth.
The result leaves Real with a four-point lead over second-placed Barcelona, who travel to Athletic Bilbao on Sunday.
Atletico's fourth win in six games over Carlo Ancelotti's side was a dominant display from start to finish and draws them level on points with Barcelona.
Real were without the injured quartet of James Rodriguez, Sergio Ramos, Luka Modric and Pepe, but they did welcome back Cristiano Ronaldo following a two-match suspension. But a lacklustre display saw them fail to register a shot on target until nine minutes from time.
Courtesy: BBC Sports