Miami clamped down in the third quarter and Ray Allen came up big in the fourth as the Heat rallied for a 99-87 NBA playoff victory over Indiana.
Heat superstar LeBron James scored 12 of his 26 points in the third period as two-time defending NBA champions Miami shook off a slow start to turn the tide in the second half.
With the victory, the Heat took a two-games-to-one lead in the best-of-seven Eastern Conference Final and will try to stretch that lead when they host game four on Monday.
The winners of the series will face either San Antonio or Oklahoma City for the NBA crown.
James and teammate Dwyane Wade combined for 22 points in the third — matching the entire Pacers' total — as Miami built a 71-64 advantage.
The Pacers got within two points in the fourth, but Allen came up big, making all four of his three-point attempts in a 13-point effort in the final frame.
Indiana forward Paul George, who suffered a concussion in the fourth quarter of Indiana's 87-83 game two loss on Tuesday, led the Pacers with 17 points, while Roy Hibbert chipped in 16.
But George said the Pacers got complacent. "You can't play around with this team. I thought we got comfortable at one point."
The Pacers had pounced on the sluggish Heat early, forcing seven turnovers and holding them to six-of-16 shooting from the field in the opening quarter.
The Heat also got a scare when James went to the locker room after the third for treatment of cramps, which he later put down to dehydration.
He returned to the game, but it was Allen who starred in the fourth, with three of his four three-pointers coming in less than four minutes after the Pacers had narrowed the deficit to 76-74 with 8:37 remaining.
