Of the six CL games he played against Atletico, he only performed that well in one of them, the first leg in 2017.
Maybe he'll turn it on again in February, but he looks like he's already been at his peak so far this season. Moving to a new club and wanting the Ballon d'Or made him a lot more determined at the beginning of the season. Last season, he was clearly well below his potential through January, but I don't think he has another level to go to this season. Madrid as a team also improved drastically come last February as well.
Juve's midfield is also pretty average and the team does not create nearly as many chances as Madrid did at their best.