Real Sociedad, previously holding the worst home record in LaLiga EA Sports, halted Barcelona's impressive run, even though the Catalans remain clear leaders. The absence of Lamine Yamal, sidelined due to a contusion from a Champions League match against Red Star Belgrade, proved pivotal for Hansi Flick's side, marking their second league defeat this season after falling to Osasuna in Pamplona. Barcelona still leads the table, six points clear of Real Madrid, which has a postponed match against Valencia due to the DANA storm.

Despite their poor home performance and fatigue from a Thursday Europa League game, Imanol Alguacil’s team, who had not beaten Barcelona at home since April 2016, played with bravery and flair, often outplaying the visitors. Barcelona, missing Lamine Yamal, lacked finesse and clarity, which was evident in their gameplay.

Sheraldo Becker’s 33rd-minute strike decided the match, compounded by controversy as a goal from Robert Lewandowski was disallowed for offside by VAR early in the match.

Barcelona struggled without Yamal, lacking coherence in their attacks against a Real Sociedad side that had enough chances to extend their lead but ultimately withstood Barcelona's late pressure. For the second time this season, Barcelona fell behind and failed to recover, leading to a rare defeat.