The NBA schedule is weird. After playing 2 games in 3 days against the Celtics back in early November, the Pistons have not faced the Celtics since. Now they finally do and they will see them again in 9 days.
Last time these teams faced off, it was the final game of the season for Cade Cunningham, as he would miss the next game with a sore shin before opting for surgery. At the time of that game, the Pistons were last in the East with a 3-11 record and the Celtics were in first 10-3.