Behind Grant Williams, Celtics claim top seed in Summer League championship bracket

Grayson Allen (right) was ejected from Thursday’s game after committing a flagrant foul on Grant Williams on this play.Ethan Miller/Getty Images/Getty Images

LAS VEGAS — The Summer Celtics are fulfilling the expectation their big brothers couldn’t a few months ago.

With five players in double figures, led by 16 points and 16 rebounds from Robert Williams, Boston advanced to the Las Vegas Summer League quarterfinals with an impressive 113-87 win over the previously undefeated Memphis Grizzlies (3-1).

The Celtics (4-0) earned the top seed in the eight-team championship bracket and will play the eighth-seeded Grizzlies again Saturday at 4:30 p.m ET. The championship game is Monday at the Thomas & Mack Center.

Robert Williams added four assists and drew raves from summer league coach Scott Morrison.

“It was the best I’ve ever seen him rebound,” Morrison said. “And he’s starting to show what a lot of us have seen, which is he can pass the ball. We’re trying to put him in spots where he can make plays, do a little bit more than his traditional package.”

Despite it being the Celtics’ fourth game in six days, Morrison played all of the team’s draft picks, including Grant Williams, who led all Celtics scorers with 21 points in addition to grabbing 7 rebounds. He got into a fourth-quarter exchange with Memphis guard Grayson Allen after being fouled hard on a drive to the basket.

It was Allen’s second flagrant foul and he was ejected, to the delight of many fans at Thomas & Mack.

“He’s a competitor; I don’t take anything personal,” Grant Williams said of Allen. “Things like that happen. You respect him. He’s a talented player. He’s good friends with a couple of my friends, so I didn’t take anything personally.”

Grant Williams made 4 of 5 from the 3-point line. Carsen Edwards added 15.

“They encourage me to shoot, so it’s really comfortable just being able to let that ball go,” Grant Williams said. “Hopefully I can do that a high level so teams have to switch and it adds more to our offense.”

Tacko Fall, who remains the most popular player in summer league, continued his memorable stretch with 12 points, 8 rebounds and 4 blocked shots as Tacko-mania carries into another weekend. The highlight occurred when the game was decided as Fall slammed home back-to-back dunks, including one out of a timeout, sending the crowd into a frenzy.