Gerard Pique's first-ever double for the Catalans was not enough to earn a point as the visitors paid dearly for their defensive errors
Barcelona missed the chance to move top of La Liga as they fell to a damaging 4-3 loss away to Celta Vigo, with goalkeeper Marc-Andre ter Stegen enduring a match to forget.
Real Madrid's home draw against Eibar earlier on Sunday had opened the door for the champions to take first place, but they instead endured a miserable evening at Balaidos in a thrilling encounter.
Celta have beaten Barca in each of the last two seasons – including a 4-1 home victory last season – and raced into a three-goal half-time lead.
Pione Sisto opened the scoring following a mistake from Ter Stegen, before two goals in the space of 86 seconds – an Iago Aspas strike and an own goal from Jeremy Mathieu – rocked the visitors.
Luis Enrique's side launched a comeback after the break, with Gerard Pique's header and a Neymar penalty setting up a grandstand finish, but Ter Stegen blundered again for Pablo Hernandez's match-clinching header.
Pique did net another header in the final moments, but the hosts held on and Eduardo Berizzo now has three LaLiga victories over his Celta predecessor Luis Enrique – a man no other manager in Spain's top-flight has beaten more than once.
And Barca have now lost two of their first seven games to sit fourth in the early season table, two points behind leaders Atletico Madrid and Rea
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