Barcelona ran out 2-1 winners on Sunday night after Luis Suarez netted a second-half winner.
Cristiano Ronaldo had cancelled out Jeremy Mathieu’s opener, but the Uruguayan trapped a long punt forward by Dani Alves and then arrowed the ball past Iker Casillas to restore Barca’s lead at the Nou Camp.
Madrid now have 10 weeks to catch up with Barcelona, who have won 19 of their 21 matches in 2015.
This is Ancelotti’s third defeat in four league games against Barcelona and, if??his side cannot bridge the four-point gap with the Catalans, he will have failed??to win the Spanish league title in his first two seasons with Madrid.
However, the man who delivered Los Blancos their long awaited 10th European Cup??last season dismissed the suggestion his side would now focus their attention on??the Champions League, with a quarter-final tie against neighbours Atletico??Madrid coming up next month.
He said: “The league is not over, they have the same points advantage that we??had before but anything could happen.
“We’re not going to give a priority to either competition, the priority for us??is the league and the Champions League.”