Pritchard scored 19 of his 29 points in the first 6:35 of the fourth quarter. Jayson Tatum led the Celtics with 35 points and pulled down 14 rebounds. Both players connected for seven 3-pointers.

The the University of Oregon alum put up 19 points in the final frame alone, hitting shot after shot to start the team's fourth quarter.

Boston’s 138-129 victory at the United Center kept Joe Mazzulla’s club alive in the NBA’s in-season tournament. The Celtics cannot win their group – Atlanta did so with its win over Cleveland earlier in the day – but can claim the Eastern Conference’s wild-card berth if they finish with the best point differential of the three second-place teams.