Jaylen Brown of the Celtics made a three-pointer with six seconds left to tie the game at 117-117 and send it to overtime at the TD Garden in Boston.
Jayson Tatum, who finished with 36 points, nailed a three-pointer and Derrick White a layup in the last minute to seal the victory for the Celtics.
“Welcome to the NBA Playoffs. “Anything can happen,” said Brown, who had 26 points.
“It doesn’t end until the final buzzer sounds. We discovered a means to win the game at the very end.”
The Pacers committed 21 turnovers, including one shortly before Brown’s last three-pointer.