Real Madrid have beaten Atletico at the Bernabeu to extend their unbeaten run at the Santiago Bernabeuel to seven games.
After the visitors took the lead in the 11th minute, they held out until the 72nd minute as they were denied a first-half penalty by an offside flag.
But Cristiano Ronaldo levelled when he scored a fine strike after just two minutes.
It was a match Madrid would like to go on and beat again, as they look to extend the run they have since November.
They have scored seven goals in their last four games at the Estadio Santiago Bernabéu and only conceded once in their previous five.
Ronaldo said: “Atletico played with great intent and confidence but they lost the game in the first half.
They scored a lot of goals, but it was hard to take away.”
The visitors’ defence struggled to cope with the pressure and had their first chance in the second half, when Casemiro was brought down in the box.
“I think they’re a team that have never played against Real Madrid, and they were not prepared,” said Real boss Carlo Ancelotti.
“They didn’t know what to do with the ball, but they knew how to play it.
They had a lot to prove in the Champions League and that’s why they lost 2-0.”
Kaka has now scored three goals in his last four La Liga games against Real, and was not far behind for Atletico in their most recent encounter.
“He’s a player that’s always going to score goals, and it was a great performance by the defence,” said Atletico’s coach Diego Simeone.
“Kaka had a fantastic game.
He’s a real player, he can score goals.”
Atletico are still in the race for the Spanish title but are one point off second-placed Barcelona, who travel to Sevilla on Wednesday.