Barca have now gone three games without a LaLiga win having picked up five points out of a possible 21, suffering defeats by Leganes and Las Palmas in their previous two home games. They are three points behind Atletico having played a game more.
Pedri sent the Catalans ahead but second-half goals from Rodrigo De Paul and Alexander Sorloth helped Diego Simeone's side move three points clear at the top of the table, having played one match fewer than Barca.
Diego Simeone's red-hot Atletico are one of the most in-form teams in Europe on an 11-game winning streak in all competitions and looking like a well-oiled machine with Antoine Griezmann, Julian Alvarez and Rodrigo de Paul firing on all cylinders.
La Liga leaders Barcelona stumbled 1-0 at home against Leganes on Sunday as they suffered another blow in the Spanish title race.
Diego Simeone's side have been in fine form and continued their winning run across all competitions with a deserved home triumph, pulling provisionally level with league leaders Barcelona.
Real missed the chance to move above leaders Barcelona in LaLiga as they stay second on 37 points from 17 matches, one behind the Catalans who host Leganes on Sunday when Atletico, in third place on 35 from 16 games, welcome Getafe.
The 23-year-old was forced off with a muscle injury in their 4-0 thrashing of Osasuna at the Bernabeu earlier in November
"We changed the position of the forwards, with Mbappe outside and he did well, like Vinicius inside," said Ancelotti.
Raphinha and Robert Lewandowski's goals put the Catalans in a healthy position but Marc Casado's red card in the 82nd minute helped Celta start the fightback to snatch a point.
Real Madrid's faltering title defence continues as they were held to a thrilling 2-2 draw at Celta Vigo which saw them fall 16 points behind runaway leaders Barcelona, who beat Levante 3-0 to stay nine points clear at the top of La Liga.
Cristiano Ronaldo and Lionel Messi are set to be tracked by a dedicated player camera during Saturday’s Clasico showdown, The Independent reports.
Lionel Messi scores a clear goal as the ball slips through Valencia goalkeeper Neto's legs but is denied by the lack of goal-line-technology.
Accustomed to unrelenting success in recent seasons, both Real Madrid and Atletico Madrid enter Saturday's first ever Spanish capital derby at Atletico's new Wanda Metropolitano stadium with little room for error.
Real Madrid forward Marco Asensio scores a stunning second-half goal as Zinedine Zidane's side put their troubles behind them by cruising to a 3-0 victory over Las Palmas in La Liga.
Barcelona continue their record-breaking start to a La Liga season by beating Sevilla 2-1 thanks to Paco Alcacer's double in an atmosphere at the Camp Nou marked by the political upheaval in Catalonia.
Following a shock 2-1 defeat to newly-promoted Girona, European champions Real Madrid's La Liga title challenge is fading fast as they trail leaders Barcelona by eight points.
Cristiano Ronaldo could face another ban after the forward pushed Girona defender Pere Pons on the face during Real Madrid 2-1 defeat, media reports suggest.
The president of the Spanish football federation expects La Liga to follow Serie A and the Bundesliga by introducing video assistant referee (VAR) technology for the 2018-19 season.
Real Madrid move back to within five points of La Liga leaders Barcelona with a hassle free 3-0 victory over Eibar.
