Karim Benzema scored the match’s only goal as Real drubbed Atletico in the Madrid derby to go six points clear at the top of La Liga.
The French striker is the second top scorer in La Liga with 13 goals, only one ponit behind Leonel Messi.
Benzema converted Ferland Mendy’s cross from six yards out to pave way for Real’s deserving win.
Fifth-placer Atletico, who have not won in five matches, were a disappointing sight, although Angel Correa hit the post.
Real could have scored more with half-time subtitute Vinicius Jr. forcing two saves from Jan Oblak.
Real remain undefeated in 21 games and have won eight in a row, including a penalty shootout win over Atletico in the Spanish Super Cup.
Meanwhile, second-placer Barcelona will host Levante on Sunday, February 2 (20:00 GMT)