Actually this is not only for Lewandowski but for the whole team even though in the first match Barcelona controlled the game with very large possession of the ball but the chances for them can be counted because of the solid midfield and Bayern defense in cutting attacks.
On the other hand, Barcelona always makes the mistake of allowing Bayern's players to attack back so that defeat is unavoidable.
I saw a lot of mistakes at the centre-backs from Barcelona, namely Andreas Christensen and Ronaldo Araujo. Their appearance was completely uncharacteristic. even their performance is below their usual standard of performance. this should be a record for xavi for the next match and otherwise the defense of bayern is really very solid. and to be honest the tempo of attack from barcelona was less organized in the match against Bayern so it was easy to break. But with this we can see the quality of Bayern Munich. with this result I think Xavi has a lot of homework to do.