Whereas earlier in his career, his form was more black or white, it seems that he's starting to get to know himself better mentally and becoming more adjusted as a result. It used to be, that he was either full on, top gear, ready and hungry or really anxious and sluggish or apathetic. The game last night, he was far from firing on all cylinders, but he still seemed focused and got a lot out of nearly every action.
I definitely think he's evolved in that aspect to a point where he now knows better how to get the best out of himself even when he's anxious or mentally or physically exhausted. That's comfort for him and means that he can keep his confidence up in tougher times ie. avoid being anxious about being anxious.