Only seen him against Utd, but the way he stepped into midfield was very impressive. Did some good things defensively too.
All of 'our (Dutch)' CB do that, it's the way 'we' want to dictate the build-up play. Pretty much the same as Piqué and Bartra were doing at Barcelona. Those rushes are very useful to break up the oppponents midfield. Defensively he's a bit shaky at times, just like Piqué. He needs a ball-winning powerful centre back next to him. Yerry Mina could be a very good partner for him.