Washington Wizards forward Bradley Beal scored 16 points as the Wizards won their third straight game to improve to 13-2 overall and 7-0 in the NBA playoffs.
Beal scored 11 of his 17 points in the fourth quarter and then added 12 assists and three rebounds in the final 2:09 as Washington beat the Heat 104 – 94 on Thursday night.
Wizards coach Scott Brooks had been without starting center Marcin Gortat, who is out for two weeks with a sprained left ankle.
“It’s a huge win for us,” Brooks said.
“This is a big day for us.
We played good defense.
We got stops, and we did a good job of getting stops.
I’m very pleased with the way we played tonight.”
The Wizards (11-12) won the first meeting between the teams in the series on Feb. 13.
They held Miami to a season-low 37.7 percent shooting (31 of 87) and shot only 35.6 percent from the field in a 104-93 victory on March 2.
Washington, though, had held the Heat to 37.1 percent shooting in the first two games.
Miami, meanwhile, had been held to 38.0 percent (23 of 44) and had shot 35.8 percent (22 of 44).
The Heat also held the Wizards to 40.7 per cent (30 of 56) shooting in their previous two games against them.
Washington had won its last four matchups in the regular season series against the Heat, including all three of those against them last season.
The Wizards have won 10 of their last 12 against the Eastern conference, including two of their four in the playoffs.
Miami has won two straight games over Washington, which has won four of the last five.
After winning its season-high eight straight games from Nov. 16-Jan. 14, the Heat were outscored 30-12 in the second half of that stretch.
That loss was their fifth straight.
The Heat played without reserve forward Josh McRoberts, who suffered a left ankle injury in Thursday’s game and did not play in the next two games due to a sore left ankle that was not considered serious.
McRoberts was expected to return to action in three to four weeks.
However, Brooks said McRoberts could be back by the end of the week.
The Wizards also got off to a fast start, outscoring Miami 23-4 in the opening quarter and 21-3 over the final quarter.
While Miami struggled offensively, Washington hit 14 of 27 from the floor in the third quarter, which was its biggest shooting night of the season.
“It was huge,” Brooks told the team’s official website.
“I was happy for the guys, I was happy to see them play.
They showed they could play with the intensity we asked them to play with.
We had a lot of shots, we had a great effort.
It was big.
I think the effort was huge.”
The Heat shot 55.6 per cent from the free-throw line, but the Wizards outrebounded them 46-31.
Rookie Josh McDavid scored 14 points and was the only Washington player to score in double figures, with rookie Trevor Ariza adding 12.
Ariza and McDavid were both scoreless as the game wore on, but Ariza had 13 rebounds and six assists, while McDavid added 10 points.
Wizards forward DeJuan Blair also scored 12 points and had four blocks, while backup guard Ben McLemore had eight points and six rebounds.
The win capped a seven-game win streak for the Wizards, who have won nine straight and eight of their past 10.
With the win, the Wizards are now 11-1 when playing at home.
ESPN Stats & Info’s Marc Stein contributed to this report.