I would not say that the Celtics played great. It was more about Toronto playing bad. I know that how the Celtics play impacts how Toronto plays but if I was the coach, I would make sure that the Celtics were not satisfied with the way they played in this game.
It seemed to me, against the zone, they were more productive when they penetrated off dribble vs just setting up for 3-pt shots. I think they have things they should work on. They can beat Toronto but I expect them to be better, meaning the Celtics will need to be better to close them out.