Asecond defeat of the season meant bad news for Barcelona and coach Ernesto Valverde, who could not hide his concern over the team's form, Marca reports.
In their worst start to a campaign since 1994/95, Barcelona remain without a win on the road and have picked up just seven points form five games after defeat to Granada.
"I'm worried because away from home we aren't getting good results," he admitted.
"When four away games have gone by, it's a symptom that something isn't too good.
"There are players who arrived late, but we haven't been good, we're not playing well away.
"We dominated, but we don't turn that into goalscoring chances.
"We haven't had a chance of turning the game around."
Valverde did not shy away from the situation and willingly took the blame.
"You always blame yourself for what happens, the actors are the players but in the end, the coach is responsible," he said.
"You can always win or lose, but when you lose, you have to deserve to win and today it wasn't like that."
Valverde's team face Villarreal at Camp Nou in midweek before travelling to Getafe next weekend.