Actually, it was as I thought that Valencia would make it quite difficult for Barcelona. Especially if we see the home team leading first, it certainly made the Barcelona players a little panicked to be able to reply to the goal. But Hansi Flick did show his experience in managing a big team and the result was this narrow victory that allowed Barcelona to steal 3 points from Valencia's home.
A good start to Flick. Of course, playing at home to Valencia is not an easy problem. Barcelona's first half didn't play well, but in the second half they were able to improve the game. Lewandowski's first goal was a turning point. Their game pattern is still the same, a characteristic of ball possession. I see Yamal as a differentiator. He can always open up space by dribbling on the right side. That made Valencia have to work the right side to stop Yamal. I also saw Barcelona field a lot of young players, but they were still strong in possession of the ball in the second half.