The Boston Celtics and Milwaukee Bucks both could be without an important player for Thursday night's showdown at Fiserv Forum.

Celtics guard Jaylen Brown, who's missed the past four games with a right hamstring strain suffered in last week's loss to the Brooklyn Nets, is officially listed as doubtful to play versus the Bucks. He's the only player listed on the injury report the Celtics announced Wednesday. 

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Bucks forward Giannis Antetokounmpo avoided a serious injury after falling awkwardly in the fourth quarter of last week's loss to the Los Angeles Lakers.

He had an MRI on his knee over the weekend that showed a minor joint capsule sprain, per the team. The reigning league MVP has missed the past two games, but he returned to practice Wednesday. Antetokounmpo is questionable to play versus the Celtics. 

Thursday's game will be the third of four matchups between the Celtics and Bucks in the regular season. These teams split the first two meetings, with each winning on its home floor.

Don't miss NBC Sports Boston's coverage of Bucks-Celtics, which begins Thursday at 7 p.m. with Celtics Pregame Live, followed by tip-off at 8 p.m. You can also stream on the MyTeams App.