Giannis Antetokounmpo is doubtful as the Milwaukee Bucks try to clinch an NBA Finals berth, while Atlanta Hawks star Trae Young is questionable for Saturday's clash.

The Bucks moved 3-2 clear in the Eastern Conference Finals after beating the Hawks 123-112 in Game 5 on Thursday, with Antetokounmpo and Young both watching from the sidelines.

Bucks superstar Antetokounmpo is likely to miss Game 6 after sitting out the previous contest due to a hyperextended left knee suffered in the Game 4 loss away to the Hawks.

Two-time MVP Antetokounmpo landed awkwardly on his left leg with just over seven minutes remaining in the third quarter in Atlanta, where he jumped up to contest an alley-oop from Lou Williams to Clint Capela, but his knee buckled before he hobbled to the locker room.

Young has missed back-to-back games with a bone bruise in his right foot following a freak injury in Game 3, which saw the Hawks guard step on the referee's foot at State Farm Arena.

Antetokounmpo has been averaging a career-high 29.2 points in the playoffs, along with 13.0 rebounds and 5.4 assists.

The 'Greek Freak' had averaged 28.1 points, 11.0 rebounds and a career best-tying 5.9 assists per game in the regular season.

Young has been averaging 29.8 points, 9.5 assists and 2.7 rebounds in his first playoff campaign, having averaged 25.3 points, a career-high 9.4 assists and 3.9 rebounds in the regular season.

Milwaukee are eyeing their first championship since 1971, while they last reached the NBA Finals in 1973-74.

Champions in 1958, the Hawks have not featured in the Finals since their triumphant season 63 years ago when they were still based in St Louis.