Jayson Tatum scores 16 of his 42 points in the fourth quarter for Boston.

“Everybody needs to look in the mirror and do a little bit more,” Tatum said after Boston’s most-recent loss.

JaVale McGee scores 21 points and grabs 15 rebounds as Phoenix wins for the 20th time in 21 games.

Matt Grzelcyk scores his first goal of the season with 2:33 left in regulation, snapping Boston’s two-game losing streak.

Celtics’ legend Bill Russell, a civil rights icon, won two NCAA titles with San Francisco, the 1956 Olympic gold medal and 11 NBA titles in 13 seasons.

Boston dropped to 13-13 with Wednesday’s uninspired loss to the Clippers, and might need to explore the trade market for a needed boost.

Guard Dennis Schröder scored 31 points, but also had eight assists and only turned the ball over once.