BOSTON — Before the Orlando Magic left Florida to begin their first-round playoff matchup against the Boston Celtics, they felt they had learned valuable lessons last spring about the mental side of an NBA postseason series.

So much so, star Celtics forward Jaylen Brown suggested a fight might break out if the referees did not intervene more often.

The Celtics once again struggled from three, shooting 25 percent on 40 shots from the arc. The series shifts to New York, with Game 3 on Saturday at Madison Square Garden.