I don't know how you are satisfied with Juventus' performance. Did Juventus play well in the FIFA Club World Cup? I don't think the team played well. They lost two of their four matches. Juventus won against two weak teams like Wydad and Al Ain. But Juventus lost against city and madrid. Juventus lost against City by a big margin of 5-2.
Juventus' defenders did well against real madrid . That's why the team lost only 1-0. but we have seen such defensive tactics and strong defense of Juventus in the previous season. We have also seen weak performance of juventus' attack. I do not see any change in Juventus' performance so far. If they perform like this , it will not be possible for the team to dominate Serie A.
Truth be told all the two teams that Juventus won where against really poor oppositions Juventus performance could be described as been below average I for one was not impressed by what they put up in this competition, Juventus has a great work to do if they are to finish well in the coming Seria A season
After having Juventus and Inter Milan in this club world cup now I am having not good expectations from them for next season in Champions League because their performance was completely mediocrity which is not going to help them in Champions League.
They needed to work on their strength and also have changed in depth which increase their quality and consistency against top elite clubs things were below then average and this sure signalling serious changes otherwise they are going to lose too much which is not easy to recover. Inter Milan and Atlanta having good attacks others are badly struggling which is surely going to be problem in future while other clubs are also having too many on and off the field problems.