Real needed a Cristiano Ronaldo goal eight minutes from time to rescue a point at Atletico's Calderon stadium in a typically feisty Madrid derby, before Lionel Messi became only the third player to reach 230 La Liga goals in Barca's victory at the Nou Camp.
With 12 matches left, Real lead on 64 points, with champions Barca, chasing a fifth title in six years, second on 63 and Atletico, who are mounting a genuine challenge for the first time since they last won La Liga in 1996, third on 61.
Atletico recovered from conceding in the third minute to lead Real 2-1 at halftime and were closing in on a first home win against their neighbours in nearly 15 years before Ronaldo pounced on a loose ball and fired low into the corner.
It was the Portugal forward's 23rd goal of the campaign and helped extend Real's unbeaten run to 28 matches, stretching back to a 2-1 reverse away to Barca at the end of October.
