Barcelona slipped to their second La Liga defeat on the bounce after Mikel Oyarzabal's early header helped Real Sociedad to a 1-0 win at the Estadio Anoeta.
The teenager looped his attempt over the reach of Claudio Bravo, which the visitors were ultimately unable to respond to across the remaining 85 minutes.
Geronimo Rulli was forced into making a handful of saves, the best of which came early in the second half to help Andres Iniesta's long-range drive over the crossbar in the Basque Country.
Relive how the 90 minutes of action unfolded with Sports Mole's live text coverage below.
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REAL SOCIEDAD STARTING XI: Rulli, Mikel, Illarra, Granero, Prieto, Vela, Zurutuza, D.Reyes, De la Bella, Oyarzabal, Elustondo
BARCELONA STARTING XI: Bravo, Pique, Mascherano, Alves, S.Roberto, Busquets, Arda, Rafinha, Messi, Neymar, Munir
REAL SOCIEDAD SUBS: Bardaji, Bruma, R. Pardo, Zaldua, Hector Hdez, Jonathas, Zubeldia
BARCELONA SUBS: Ter Stegen, Rakitic, Iniesta, Bartra, Jordi Alba, Adriano, Vermaelen
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Eusebio Sacristan: "We will just be trying to exploit our own virtues. Bearing in mind the side we are up against, we need to neutralize their strong points – and they have a lot of strong points. For me, Barca are the best side in the two most important facets of the game – in attack and in defence. They are the most balanced side and the ones who gets the best out of their resources. So we have to be at our best to compete against them. Whenever La Real have played to the best of our abilities, we've been able to beat some of the toughest sides in La Liga."
Luis Enrique: "If we look at the precedents, it's clear there's no other stadium in Spain as difficult for us. A streak as long as that merits some reflection, so we can get to work because one thing is certain - it will be a difficult match. I'd say it is the most difficult away match of the season. These three points would be a big help after having gone so many years without winning there. There are still seven games left. It looks to be pretty even. We can't get ahead of ourselves until we've mathematically won it."
Cmon! Alé Barça, alé alé! #anoeta #donostia #realsociedad #barça #fcb #ligabbva
A photo posted by Oriol Puig Buil (@pox90) on
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REAL SOCIEDAD SUBS: Bardaji, Bruma, R. Pardo, Zaldua, Hector Hdez, Jonathas, Zubeldia
BARCELONA SUBS: Ter Stegen, Rakitic, Iniesta, Bartra, Jordi Alba, Adriano, Vermaelen
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