Match ends, Real Madrid 0, Atlético de Madrid 1.
Atletico Madrid won a third consecutive La Liga Bernabeu derby to practically end Real Madrid's title hopes.
Diego Simeone's visitors are now five points off leaders Barcelona, who have a game in hand, while Real are nine points below the champions.
Antoine Griezmann scored the only goal, early in the second half, when he steered Filipe Luis' pass home.
Real, who were two points off Barca when Zinedine Zidane took over, had not lost in his first eight games as boss.
The result means Atletico are the first side in La Liga history to win three times in a row at the Bernabeu, as Real fans called for club president Florentino Perez to resign.
Champions and leaders Barcelona, who are unbeaten in 33 games, host Sevilla - the last side to beat them - on Sunday (19:30 GMT).
- 15CarvajalBooked at 90mins
- 4RamosBooked at 90mins
- 22IscoSubstituted forRodríguez Ruizat 70'minutes
- 10RodríguezSubstituted forVázquezat 57'minutesBooked at 62mins
- 9BenzemaSubstituted forMayoral Moyaat 45'minutes
- 7Cristiano Ronaldo
- 20Rodríguez Ruiz
- 29Mayoral Moya
- 20Torres Belén
- 24Giménez de VargasBooked at 72mins
- 2GodínBooked at 31mins
- 3Filipe LuísBooked at 37mins
- 14Fernández Arenas
- 12FernándezSubstituted forKranevitterat 77'minutes
- 9TorresSubstituted forCorreaat 81'minutesBooked at 90mins
- 1Moyá Rumbo
- 10Torres Muñoz
- Carlos Clos Gómez
- Shots on Target
Second Half ends, Real Madrid 0, Atlético de Madrid 1.
Attempt blocked. Cristiano Ronaldo (Real Madrid) right footed shot from outside the box is blocked.
Sergio Ramos (Real Madrid) is shown the yellow card for a bad foul.
Foul by Sergio Ramos (Real Madrid).
Gabi (Atlético de Madrid) wins a free kick in the defensive half.
Daniel Carvajal (Real Madrid) is shown the yellow card.
Ángel Correa (Atlético de Madrid) is shown the yellow card for a bad foul.
Danilo (Real Madrid) wins a free kick on the left wing.
Foul by Ángel Correa (Atlético de Madrid).
Attempt missed. Danilo (Real Madrid) left footed shot from the left side of the box misses to the right. Assisted by Jesé following a fast break.
Luka Modric (Real Madrid) wins a free kick in the attacking half.
Foul by Matías Kranevitter (Atlético de Madrid).
Attempt missed. Antoine Griezmann (Atlético de Madrid) left footed shot from outside the box is just a bit too high.
Foul by Danilo (Real Madrid).
Ángel Correa (Atlético de Madrid) wins a free kick in the attacking half.
Attempt saved. Cristiano Ronaldo (Real Madrid) header from the centre of the box is saved in the centre of the goal.
Attempt saved. Saúl Ñíguez (Atlético de Madrid) left footed shot from long range on the right is saved in the bottom left corner.
Substitution, Atlético de Madrid. Ángel Correa replaces Fernando Torres.
Attempt blocked. Luka Modric (Real Madrid) right footed shot from the right side of the box is blocked. Assisted by Daniel Carvajal.