What happened: Jayson Tatum and Paul George lead the new-look Celtics into Detroit against Cade Cunningham and Jalen Duren. Tip is set for 3 p.m. ET on NBC and Peacock in Detroit.

Why it matters: Detroit opens as last year's top-seeded team, raising the bar for opening night. Boston arrives with a reshaped core, making its first rotation the early point of interest.

What to watch: Opening-night rotations and matchups come into focus closer to tip.