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.

The win was all the more impressive in a game that never felt in danger of being lost despite the absence of Jayson Tatum.

Orlando’s vaunted physicality was put on display once again, but the Celtics were still able to claim a 2-0 series lead