Boston Celtics guard Kemba Walker, left, goes up for a shot in front of Miami Heat guard Tyler Herro during the first half of their NBA playoff game on Thursday in Lake Buena Vista, Fla. (AP photo)

LAKE BUENA VISTA, Fla. — Goran Dragic scored 25 points, Bam Adebayo led a big third-quarter rally to finish with 21, and the Miami Heat pulled off another comeback to beat the Boston Celtics 106-101 and take a 2-0 lead in the Eastern Conference finals Thursday night.

Duncan Robinson scored 18 points, Jimmy Butler had 14, Jae Crowder 12 and Tyler Herro 11. The Heat were down by 17 in the second quarter and trailed by 13 at halftime.

They had been 0-21 in playoff games when trailing by at least that many at intermission. They’re 1-21 now, and two wins away from their first NBA Finals since 2014.

“We like to make it hard on ourselves,” Butler said. “We like being down double-digits and being the comeback kids.”

Kemba Walker had 23 points for Boston, which got 21 apiece from Jaylen Brown and Jayson Tatum. Brown missed a corner 3 that would have tied it with 15 seconds left, and Butler sealed it with two free throws with 7.4 seconds remaining.

Game 3 is Saturday. Dragic — playing on the third anniversary of his fondest basketball moment, leading Slovenia to the European Championship — scored nine points in the fourth quarter.

The Heat took a 2-0 series lead for the 11th time in coach Erik Spoelstra’s tenure. They’ve won all previous 10 instances.

The Heat got in big trouble in the series opener by scoring 18 points in the first quarter and 16 points in the third. In Game 2, another 18-point quarter — the second — sent Boston into the half up comfortably, 60-47.

Miami outscored Boston 37-17 in the third, with Adebayo — the defensive hero of Game 1 — outshooting and nearly outscoring the Celtics by himself. Boston went 4 for 12 from the floor in the quarter, Adebayo went 7 for 8 on his way to a 15-point period and the Heat led 84-77 when it was over.

With that, it was Boston’s turn to rally. The Celtics went on a 15-2 run in the fourth, silencing the Heat for nearly seven minutes and going up 94-89 on a 3-pointer by Walker with 4:25 left.

That only set the stage for another rally: Miami finished the game on a 17-7 run.