Barcelona scraped a 1-1 draw at Real Sociedad on Sunday.
Willian Jose gave the hosts a lead in the 53rd minute, only for Lionel Messi to answer six minutes late in a match largely controlled by the hosts.
For Barcelona, it marks the eighth consecutive match in all competitions in which they have failed to win on Real Sociedad's home turf.
The result also leaves Barcelona six points adrift of table toppers Real Madrid heading into next Saturday's Clasico.