Barcelona coach Gerardo Martino has admitted that a number of tactical errors led to Saturday's 3-1 defeat to Real Sociedad.
"I didn't prepare us for the game well enough, Real were the better team. Now we have to get up, we have a week to prepare the next game," the 51-year-old told reporters.
"It was probably a mistake not to make changes when the score was at 1-1. Introducing Xavi wouldn't have made any sense, as [Cesc] Fabregas and Alexis [Sanchez] were already present."
The Catalans, who were involved in a three-way tie in the Primera Division standings prior to the gameweek, could slip to third in the table if Atletico Madrid avoid defeat over Osasuna later today.