I doubt what Barcelona played yesterday was actually their best, considering the fact they had the most ball possession and shots on target in both halves of the game, because what I felt yesterday was that Barcelona was literally just too relax and never played aggressively just same way they played with Real Madrid few days ago,which was actually a strong team. Because if Hansi Flick really meant to win yesterday's game, he would have came up with a workable strategy, as it's obvious what they wanted was a draw.
Another point of consideration was the importance attached to that game, seeing that loosing will cause no harm to them, they switched priority at that point, this is my honest opinion, I'm saying this because seeing that they had most of the possession and all of the dominance, I was expecting to see them pull off one of those epics scorelines but it was different so I could only think of it to be that they actually did attached less priority to the game. Hopefully flick gets his game better because beyond this stage it's going to be even more tedious than it has been.