Barcelona were held 0-0 by Rayo Vallecano in their opening game of the La Liga season and had captain Sergio Busquets sent off late on.
The Catalans had 21 shots on goal and the majority of possession at the Camp Nou but were unable to break the deadlock. Barca boss Xavi started close-season signings including defender Andreas Christensen, winger Raphinha and striker Robert Lewandowski, who were only able to feature after being registered with the league late on Friday.
The five-time Champions League winners had to comply with La Liga's strict financial controls before being able to confirm the likes of ex-Bayern Munich attacker Lewandowski in their squad ahead of the new campaign. "We could have won, but now we have to correct our mistakes and think about Real Sociedad next weekend," said Barcelona defender Eric Garcia. "We wanted to start the season on the right foot and with a victory, but we knew that Rayo gave us a lot of problems last year.
They were good defensively tonight." The hosts dominated the opening half an hour as Lewandowski was denied a goal on his competitive debut.