That's right, Hansi Flick really needs to strengthen his defense, last season they conceded 39 goals in La Liga. For the midfield and front line, I think Barcelona currently has very good players. So I think Hansi Flick only needs to strengthen his second tier players for those two areas and it's better to focus on fixing his defense, there's no need to worry about the front line, because we can see last season they performed very productively by scoring 102 goals in one season. Barcelona might have to reconsider their plan to recruit Nico Williams, because maybe the transfer will spend almost all of their budget in the summer.
I won't say that Barcelona's defense played badly in La Liga. But Barcelona should strengthen their defense a little more. Madrid is increasing their strength. If Barcelona wants to survive in the competition, they must strengthen their defense.
Hansi Flick knows the weaknesses of his squad very well. That is why he added Joan Garcia to the squad, Flick is no longer relying on Ter Stegen. In addition, Barcelona is going to buy Nico Williams as a replacement for Lewandowski. And now Barcelona will have to try to strengthen their defense. However, we have not seen Barcelona take any visible steps to strengthen their defense. However, Barcelona should definitely bring an experienced defender to the squad.