Second-half goals from Luis Suarez and Ousmane Dembele kept Barcelona's 100 per cent in La Liga going as they came from behind to win 2-1 at Real Sociedad on Saturday.
It had been Sociedad who had opened the scoring in the 12th minute as defender Artiz Elustondo rifled home a shot after Barcelona had failed to clear a free-kick.
Sociedad had chances to extend their lead and were made to regret missing a number of opportunities as Ernesto Valverde's men hit back.
Suarez turned in the equaliser from a corner in the 63rd minute as he reacted first to reach Gerard Pique's header down from the set-piece.
Three minutes later Barca were in front as Dembele fired home from close range after the ball had bounced loose from another corner.
Barca held on to make it four wins out of four and set them up nicely for their opening Uefa Champions League game against PSV Eindhoven on Tuesday night.
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