What happened: Boston's new-look pairing begins its first year together on the road against Detroit in the Celtics' Oct. 20 opener at Detroit. The Tuesday afternoon matchup tips off at 3 p.m. ET as part of the league's opening-week national television slate.

Why it matters: The opener marks the first official test for Boston's revamped roster following the offseason Jaylen Brown trade. Detroit enters the matchup coming off a 60-win campaign, giving both Eastern Conference contenders an immediate early-season benchmark.

What to watch: After the Tuesday opener in Detroit, attention shifts to NBA Cup group play when the league unveils its 30 new tournament courts on Oct. 30.