A fumble from new signing Claudio Bravo saw Barcelona slip to a 1-0 defeat in a friendly match against the Italian side Napoli.
Barcelona were without Messi, Neymar and Suarez but also failed to convert first-half superiority into goals.
The only goal of the match came in the 80th minute, Bierim Dzemaili scoring from long range after Bravo made a pig’s ear of the save.