He had a monster game. He actually bailed Chiellini out a number of times.
Let's also remember that this time they defended corners well.
He had a very bad blunder once, when he passed it straight up to a Dortmund player in front of him. But as lucky as he is, it didn't result in a goal.
Other than that he was almost flawless.
I trust him more than ever before, but still not enough. It would be better to have 2 different CBs.
But Chiellini has clearly been a worse performer this season.