Obvious Fox had a great offensive game, but to me I think the last game was his best defensively. He was active; got in passing lanes, for steal that led to fast break/dunk. He was wearing other players, playing solid defense without fouling. He wasn't going for head fakes. He was going for chase down blocks and help defense in the paint. He gambled for a steal here and there, but I'm okay with that.
Fox can still improve, especially with his free throws and 3 pt shot, but this is what I've been waiting for. The dribble penetration is there, but I've been waiting for his defense to reach "another level."