Staff Reporter.
Barcelona suffered defeat in their first match since winning La Liga as Real Sociedad boosted their Champions League qualification hopes.
Sociedad scored in the fifth minute when Alexander Sorloth set up Mikel Merino to finish from close range.
Sorloth then added a second in the 72nd minute to give the visitors a deserved two-goal lead.
Robert Lewandowski pulled a goal back in injury time but the champions were unable to find a leveller.
Barcelona sealed their first La Liga title since 2018-19 with four games to spare last weekend by winning away to city rivals Espanyol.
On Saturday, they lifted the La Liga trophy in front of their home supporters after the match with Sociedad at the Nou Camp.
With the win, fourth-placed Sociedad restored their five-point gap over Villarreal in fifth.
Champions Barcelona have an unassailable 14-point lead over second-place Real Madrid, who play at Valencia on Sunday. Atletico Madrid are third on 69 points.
Meanwhile At least twelve people have died after a crush at a football stadium in El Salvador’s capital, San Salvador, officials have said.
The incident occurred during a match between local team Alianza and the Santa Ana-based team Fas at Cuscatlán Stadium.
The match was subsequently suspended.
President Nayib Bukele described the event as “unprecedented”, and said an “exhaustive investigation” would be launched.
Police had earlier said that seven men and two women were among the dead, with all the victims over the age of 18.
The disaster reportedly occurred after a large number of fans tried to enter the venue after the gates had been closed.