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 are confident they can rely on a deep pool of talent already at their disposal rather than go on a shopping spree to improve on a stellar 2021-2022 season.
Spanish football club Barcelona sold a 25% stake in its audiovisual studio to digital fan token firm Socios.com for 100 million euros ($102 million), club chief Joan Laporta said on Monday, as the LaLiga giant steps up efforts to bring in revenue to register new players.
Atletico Madrid have signed versatile Argentina defender Nahuel Molina from Udinese on a five-year contract, the LaLiga club announced on Thursday.
France international forward Ousmane Dembele has signed a new two-year deal with LaLiga side Barcelona after his previous contract expired at the end of June, the Catalan club said on Thursday.
Barcelona have reached an agreement in principle to sign Brazilian winger Raphinha from Premier League side Leeds United, both clubs announced on Wednesday.
Barcelona president Joan Laporta said Wednesday that Dutch midfielder Frenkie de Jong is not for sale despite rumours of a departure to the Premier League.
Veteran Belgian midfielder Axel Witsel has joined Atletico Madrid on a free transfer from Borussia Dortmund, the Spanish La Liga club announced on Wednesday.
Retired Real Madrid and Brazil striker Ronaldo swapped his cleats for an electric bicycle as he set off on a nearly 450-km (280 mile) trip after promising to do so if his club Real Valladolid earned promotion to Spain's top-flight league.
Real Madrid remain Europe's most valuable football club despite the ever-increasing dominance of the English Premier League, according to a report published Thursday by analysts Football Benchmark.
Barcelona finished 13 points behind La Liga champions Real Madrid after ending their turbulent season with a whimper on Sunday by losing 2-0 at home to Villarreal.
