Barcelona fans have called on the club to sack manager Ernesto Valverde and re-sign Neymar following the opening-day defeat.
The Spanish giants started the defence of their La Liga title with a 1-0 loss at Athletic Bilbao on Friday night.
Artiz Aduriz, 38, came off the bench to net a late winner for Bilbao with a stunning acrobatic effort which left goalkeeper Marc-Andre ter Stegen stranded.
It capped a frustrating night for the Catalan club, who saw Luis Suarez and Rafinha both denied by the woodwork in a poor display.
Captain Lionel Messi missed the game with a calf injury and Barcelona’s problems deepened when Suarez hobbled off midway through the first half.
After several suggestions during the summer that his job was at risk, the result has only increased pressure on Valverde with several Barcelona fans taking to Twitter to demand the Spaniard’s exit.
“VALVERDE OUT. Everyone get this to the top, this was embarrassing,” wrote one fan, while another added: “Sack Valverde!! Before it’s too late.”
A third continued: “Football gods wanted to expose Valverde that’s why Messi couldn’t play this first match. Open your eyes Bartomeu.”
And a fourth said: “Most boring and third most embarrassing game behind the UCL disasters I’ve seen # ValverdeOut”
Amid the demands for Barcelona to part company with their manager, the result also reinforced calls for the club to push forward with a deal for Neymar.
The Spanish giants, who sold the Brazilian to Paris Saint-Germain for a world-record fee in 2017, are currently looking bring the 27-year-old back to the Camp Nou but have not been able to agree a deal.
“Enough is enough!” wrote one fan. “Put Griezmann, Dembele, Valverde and all our reserves in the deal to bring back Neymar!”
A second, also using the hashtag # ValverdeOut, added: “We badly need Neymar…Griezmann..Neymar And Messi…A dream trio…”
Recent reports have suggested that Barca have made several offers for their former forward and been exploring the possibility of sending Philippe Coutinho to the French club in a player-plus-cash deal.
But that option now seems to be off the table, with Bayern Munich reaching an agreement to sign Coutinho on loan, with an option to make the deal permanent at the end of the season.