Flick offers no excuses for Barca loss
Hansi Flick did not offer any excuses after Barcelona's poor performance in its shock 1-0 defeat away to Real Sociedad.
Sheraldo Becker scored the only goal for the hosts in the first half, with Barca offering little while searching for a comeback.
The defeat ended Barcelona's run of seven straight victories in all competitions, although it remains six points ahead of Real Madrid – who have a game in hand – at the top of LaLiga.
"Today was not our day," Flick said. "I think we have to accept this result because they played decisively. It's clear, there are no excuses. We didn't create enough chances.
"We started well with the ball, I was happy, but then we started to suffer and their goal came. We also made some bad decisions and that's something we have to live with."
Barcelona had scored in every game it had played in all competitions this season until the loss to La Real, although it did not even manage a shot on target at the Reale Arena.
It is just the second time Barca has failed to do so since at least the 2003-2004 season, after a match against Malaga in September 2014.
"The responsibility for the defeat is ours. We could and should have played much better," Flick said. "We haven't held possession of the ball the way we wanted and suffered. But the games we have played before have been fantastic, and I appreciate what the team has done so far this season.
"We tried until the last second, united, and I told the team that. But today we weren't strong enough to deserve a better result."