Barcelona didn't have an easy job at all though. It was like they were waiting for Valencia to score to start performing better. 
Lewandowski was on his very good day that he scored two goals. It is good to see him being beneficial for his team. Because he is one of top earners in the squad now. Therefore the expectations are bigger as well.
I still believe it could be his last year at Barcelona on one hand. He is 35 and has 2 years left on his contract. If he plays much extra this season then maybe the team could consider keeping him for one last year.
Barca played their usual possession game. It wasn't easy to create chances but they did. Lewandowski showed a good game. Yamal also showed his contribution. Lewandowski was on his very good day that he scored two goals. It is good to see him being beneficial for his team. Because he is one of top earners in the squad now. Therefore the expectations are bigger as well.I still believe it could be his last year at Barcelona on one hand. He is 35 and has 2 years left on his contract. If he plays much extra this season then maybe the team could consider keeping him for one last year.
Securing the first 3 points is quite important for Barca, especially with their new coach. Of course, in the first few games, the focus will be on assessing how well Flick can maximize the team he has.
Just hope Barca has a better and more consistent game.