Nishioka was poor but at least Grigor didn't let him back into the match which he has been known to do in the past. He's moving well and has looked comfortable on these courts so far. Serve is still unimpressive though.
Next match against Sinner should be interesting as Grigor will at least play with more variety than Tsitsipas did today. Sinner is good at attacking short balls and weak serves so Grigor will have to serve better and keep the ball deep. Grigor definitely has the game to win though