Lewandowski's presence had a big impact on Barcelona's forward line, as he is a very experienced player with accurate finishing. His presence made the Barcelona players more confident. This season Xavi Hernandez's work as a coach will be tested in his tactics so that Lewandowski will continue to look good.
Some Barcelona fans have also assessed that Xavi Hernandez's gait as a coach will be better next season with a line of players that are already very accurate now so that a player like Lewandowski will find it easier to give his full ability to Barcelona. And in the friendly match, it can also be seen how Barcelona have been able to overthrow Real Madrid today.
Of course even though it's a pre-season game this result is a warning to Madrid. Last season they also beat Madrid in the second match. This means that Barcelona is no longer like the beginning of last season. Xavi has indeed changed Barca for the better. They were able to prove last season ended in second position. In addition, this season's transfer market is used by Xavi to make Barca even more powerful. I think tomorrow they are candidates for the La Liga title.