Robert Williams III had 14 points and 12 rebounds for Boston, along with a key block in OT. The Celtics won for the fourth time in six games. “We went through adversity, a couple of arguments within the team.”

Pacers scoring leader Domantas Sabonis was held to 11 points but had 23 rebounds after scoring a career-best 42 points in his last game. Indiana is 13th.

Torrey Craig led the Pacers with 19 points and Lance Stephenson scored 14 but missed a potential tying 3-pointer late in OT. Indiana has lost seven of eight.

With Indiana trailing 101-98 after Tatum’s two free throws with 2.5 seconds left, Robert Williams stole Indiana’s long desperation pass from its own baseline and the horn sounded.