I thought Novak looked awful. He has always been one of the tours most consistent hitters, and he was missing shots that we almost never see. Yes Simon makes everyone overhit (or underhit), but Novak was taking a lot of pace off his ground strokes just to stay in rallies, and you could tell he wasn't confident going down the line even with the slowed down gameplan.
He was quite passive as well, and didn't generate much with his movement, instead allowing Simons slow pace balls to reach him deep behind the baseline.
It just looked nothing like the dominant player we've seen the past few years. He needs to improve a lot, in a hurry if he wants to stay in this.