Barcelona are not in their best form and their striker Lewandowski still have troubles in early matches. He has yet warmed up enough but we must know that in this season, Lewandowski is one more year older than the past one. Barcelona and Xavi will have to prepare for decreasing performance of Lewandowski in this season or next one or two seasons.
Yes, you are right, last month he was 35 years old, actually that's not old, he's still relatively young, but at that age his performance usually declines, that's why Madrid bought a lot of young players because as we know, there is a golden age where great players have to retire or earn money in the Arab league, giving quota to young players to exist in the European league.
I think Xavi is also thinking about this, that of course there is nothing Lewandowski can hope for this season because looking at last night's match he only contributed goals from penalty kicks and was not productive in scoring goals for Barcelona last night, but apart from that Xavi is still satisfied with the results Barcelona were able to get three points from this game and strengthen their position in Laliga as well.