Gonzalo Higuain's stunning injury-time strike secured a remarkable 3-2 comeback win for hosts Real Madrid in the Primera Liga on Tuesday.
Real Sociedad are fourth in the table on 28 points, three points behind third-placed Sevilla.
Real Mallorca earlier came from behind to beat a weakened Barca 2-1 and spoil the new Primera Liga champions' celebrations on Sunday. Barcelona had clinched their first league title in three years on Saturday after second-placed Real Madrid were beaten 3-2 at Villarreal.
Depleted Real Madrid ended a disappointing week with a 0-0 draw at Sporting Gijon on Saturday, handing champions Barcelona the chance to open a three-point lead at the top of La Liga.
A clinical finish by Gonzalo Higuain gave Real Madrid a 1-0 home win over Racing Santander on Saturday and a seventh successive Primera Liga victory that trimmed Barcelona's lead at the top to nine points. Third-placed Sevilla lost further ground on Real after goals from Sergio Garcia and new signing Ricardo Oliveira gave Real Betis a 2-1 win at the Sanchez Pizjuan and condemned their city rivals to a third consecutive league defeat.
The Primera Liga title will be decided by "El Clasico" between leaders Barcelona and second-placed Real Madrid at the Bernabeu in just under two weeks, according to Real midfielder Lassana Diarra.
La Liga champions Barcelona stayed on the heels of leaders Real Madrid by coasting to a 3-0 home win over Athletic Bilbao on Saturday as Lionel Messi became the club's top scorer from free kicks.
Real Madrid equalled a Spanish record of 39 games unbeaten in all competitions by crushing struggling Granada 5-0 on Saturday to go six points clear at the top of La Liga.
Unbeaten in six games, the draw leaves third-placed Sevilla on 51 points, four ahead of Real Sociedad and five ahead of both Getafe and Atletico Madrid, while Levante are 12th on 35 points.
A round-up of Wednesday's action in the UEFA Champions League.
A round-up of Tuesday's action in the UEFA Champions League.
A round-up of Tuesday's action in the UEFA Champions League.
Both sides had shots cleared off the line but Real were left feeling more disappointed after winning the tactical battle but failing to take their chances.
Sevilla goalkeeper Sergio Rico blundered and then made two brilliant late stops as they were held to a 1-1 draw at Alaves on Monday that dented their La Liga title bid.
Barcelona are in the middle of an injury crisis as they head to Valencia for Saturday's La Liga game looking to keep up with pacemaking pair Atletico Madrid and Real Madrid. Without injured goalkeeper Jasper Cillessen and right back Sergi Roberto for the last two games, Barca will also be missing defenders Jordi Alba and Gerard Pique after both were hurt in Wednesday's 4-0 win over Manchester City in the Champions League. Pique sprained his right ankle while Alba injured his left hamstring and both are out until November.
Real Madrid have enviously looked on as Barcelona claimed six La Liga titles in the last eight years, but Zinedine Zidane's side can take a huge step towards a first crown since 2012 with victory over their bitter rivals at the Nou Camp on Saturday.
Real Madrid's Sergio Ramos scored in the 90th minute to hold FC Barcelona to a 1-1 draw at the Camp Nou on Saturday.
Cristiano Ronaldo shrugged off the boos of his own supporters to fire Real Madrid to a 3-0 win over Real Sociedad on Sunday.
Griezmann special earns Atletico 1-1 draw at Sevilla
Monaco owe most of their recent success to their young guns, but when they face Manchester City looking to overturn a two-goal deficit in their Champions League last-16 tie on Wednesday, they will turn to a more experienced player in Radamel Falcao.
Lionel Messi was in inspired form as champions Barcelona hammered Celta Vigo 5-0 on Saturday, recording a fourth straight league victory which keeps them top of La Liga after Real Madrid had put the pressure on the Catalans with a 4-1 win at Eibar.
Photos from the Champions League matches played across Europe on Tuesday