The Miami Heat caused an upset against the top-seeded Boston Celtics to level their Eastern Conference play-off duel.

Underdogs Miami, who suffered a 20-point thrashing in the first game of the series, recovered to earn a 111-101 road victory.

The Heat torched the Celtics with 23 three-pointers – two shy of the NBA play-off record.

“Everybody came to play,” said Tyler Herro, who led the Heat with 24 points.

“We lost bad in game one and everybody responded. That’s all you can ask for from a group of guys.”

Herro sank six three-pointers and added 14 assists, with all fiveHeat starters posting double-digit points.