With the Serie A season right around the corner, Juventus' summer struggles still haven't been fixed

Here is a 182-word summary of the news article: As the new Serie A season approaches, Juventus continues to face challenges from their tumultuous summer. Ahead of their match against Borussia Dortmund on Sunday, Juventus' problems have not been resolved. The article highlights that the Dortmund match will also serve as the farewell game for veteran defender Mats Hummels. This adds an extra layer of significance to the fixture. Juventus has undergone significant changes in their squad and coaching staff during the offseason. The departure of key players like Adrien Rabiot and the uncertain future of Dusan Vlahovic have left the team in a state of flux. Additionally, the club's decision to part ways with manager Massimiliano Allegri has raised further questions about the team's direction and cohesion. The article suggests that Juventus is still grappling with the aftermath of these upheavals as they prepare for the new Serie A campaign. The piece emphasizes that Juventus must address these issues quickly if they hope to mount a successful challenge in the upcoming season.