The Boston Celtics will be without a key player on Thursday against the Milwaukee Bucks.

Jaylen Brown has been downgraded to out due to a right thumb sprain he sustained in Wednesday's game against the Detroit Pistons. Robert Williams also will be out due to a left hip bone edema.

Brown is averaging 20 points, 6.9 rebounds and 2. 3 assists per game this season for the C's while shooting 49.2 percent from the field and 39.5 percent from beyond the arc.

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Boston has lost four out of it's last six games and things won't be easy against Giannis Antetokounmpo and the first-place Bucks. With Brown out, Kemba Walker and Jayson Tatum will be relied upon even more to put up big numbers and provide Boston with the spark it needs to turn things around.

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