The Milwaukee Bucks are on the cusp of advancing to the Eastern Conference semi-finals but Giannis Antetokounmpo warned "our job is not done" against the Miami Heat.

Milwaukee are one win away from sweeping reigning Eastern Conference champions Miami in the opening round of the NBA playoffs following Thursday's 113-84 rout in Game 3.

Bucks superstar Antetokounmpo posted 17 points and 17 rebounds to go with five assists, while Khris Middleton (team-high 22 points) and Jrue Holiday (19 points and 12 assists) contributed en route to a commanding 3-0 series lead.

The Bucks – who were eliminated by the Heat in last season's Conference semi-finals 4-1 – can seal a sweep on Saturday but two-time reigning MVP Antetokounmpo is taking nothing for granted.

"We are going to stay focused," Antetokounmpo told reporters as the Bucks attempt to win their first championship since 1971. "Our job is not done here."

"The last two games haven't been easy," Antetokounmpo said. "Obviously, we were up 30, but it's not easy.

"I'll say this: I'll say by us doing our job, I'm not surprised that we're able to win a game because once we focus on ourselves, play together, have fun and be tough, good things are going to happen. And in these three games, good things have happened for us."

Holiday – an All-Star in 2013 – was acquired from the New Orleans Pelicans in November as part of Milwaukee's title pursuit.

The 30-year-old produced another impressive display against the Heat following his 15-assist performance in Game 2 as he became the first Bucks player with back-to-back 10-plus assist games in the playoffs since Sam Cassell in 2001.

"We got better from last year," Antetokounmpo said. "We've had great additions to the team that help us do that."

PJ Tucker – another recruit after he was traded to the Bucks by the Houston Rockets in March – added: "We dogs. That's all we talk about. That's all I ever talk about.

"We gotta be dogs. People's perceptions of us and what people think in the past, we're erasing all of that."