The French striker converted Ferland Mendy’s cross from six yards out to give Real a due win.
Fifth-placed Atletico, who haven’t won in 5 games, were unsatisfactory, though Angel Correa hit the post.
Real may have won by a lot of with half-time substitute Vinicius Junior forcing 2 saves from Jan Oblak.
Zinedine Zidane’s side are currently undefeated in twenty one games and have won eight in an exceedingly row – together with a penalty shootout success over Atletico within the Spanish Super Cup.
Second-placed Barcelona host Levante on Sunday.