They are the strongest team in Serie A and they bought Cristiano only to win the Uefa Champions League.They are used to winning the Serie A often and they are the team with the highest number of Serie A titles.
They will try again to win the Champions League this time.
From 2011 - 2019 (season 18/19) Juventus always won series A. That proves that they are used to being champions for series A and not just luck. For Juventus the main target is to become the Champions League champion.