from my analysis it seems that he has more than one problem in attack
if you look at their statistics they are a solid team in defense and midfield
they haven't lost even 1 game, they remain undefeated.. but by not scoring they simply draw many games as a result they don't score points and fall behind.
That is true because if you look at the number of goals conceded by Juventus is much less and that means their defense is much better and maybe the big problem is actually in the attack line because they are not at their best level of play so that the attackers find it difficult to score goals consistently in every match. The midfield is also one of the things that makes it difficult for the front line to score goals because there are no measured passes given so that it affects the quality of scoring goals.
Juventus must see this as one that needs to be resolved quickly because they have lost the opportunity to compete for the title. At least improvements must be made so that for the next match they can be a little better in terms of points.