The Celtics defeated the Grizzlies by a final score of 113-87. For the Celtics, Grant Williams led all scorers with 21 points (6-10, 4-8 3pt FG) alongside 7 rebounds, as Robert Williams III followed with 16 points (7-9 FG), 16 rebounds and 4 assists in the victory. Dusty Hannahs led the Grizzlies with 15 points (4-7 FG), as Shaq Buchanan tallied 11 points (5-9 FG), 3 assists and 2 steals in the game. With the win, the Celtics improve their record to 4-0, while the Grizzlies fall to 3-1 in the MGM Resorts NBA Summer League 2019.