Just when the Milwaukee Bucks thought they were hanging around against the defending champion Miami Heat, LeBron James and his teammates decided to get serious.

The Heat pulled away with an energetic performance in the second half Sunday to defeat the Bucks, 110-87, and take a 1-0 lead in the first-round Eastern Conference playoff series.

James was incredibly efficient, hitting 9 of 11 shots and nearly finishing with a triple-double with 27 points, 10 rebounds and eight assists.

And the Heat received huge contributions off the bench from Ray Allen, who scored 20 points, and Chris "Birdman" Andersen, who had four rim-rattling dunks and started flapping his wings for the sellout crowd of 20,006 at American Airlines Arena.

"Those were plays that were not designed for him," Heat coach Erik Spoelstra said of Andersen's dunks. "Those were multiple effort plays, going to the glass and giving us extra possessions.

"The rest of the guys got involved. LeBron was orchestrating a lot of that offense. Ray had some good looks in the first half and when he misses those, that's a sign of good things, that he'll hit them when you need them."

Brandon Jennings backed up his confident talk before the series, leading the eighth-seeded Bucks with 26 points and sinking 4 of 10 three-pointers.

Monta Ellis added 22 points but no other Milwaukee player scored more than six points.

"I felt like once we calmed down and got into our rhythm, we were able to be down only a couple points (52-45) at the half," Jennings said.

"Then in the second half they just came out and we had no answer for them."

Bucks coach Jim Boylan said his team played well in stretches.

"We just have to figure out how to sustain that," Boylan said. "That's not an easy task against a really good team.