Celtics

Kemba ruled out for Game 4 vs. Nets

Celtics

* UPDATE (5:55 p.m. ET): The Boston Celtics have officially ruled Kemba Walker and Robert Williams out for Game 4.

ORIGINAL STORY: It appears the Boston Celtics will be without Kemba Walker when they host the Brooklyn Nets for Game 4 on Sunday night.

According to SNY's Ian Begley, Walker is unlikely to play due to a bone bruise in his left knee. Celtics head coach Brad Stevens had said Walker -- who's listed on the C's injury report as questionable -- would test the knee out during morning workouts.

Stevens later confirmed to reporters that Walker and big man Robert Williams (left ankle sprain) both are unlikely to suit up.

Walker played through the injury during the Celtics' Game 3 win, but he was largely ineffective. The 31-year-old point guard finished with six points on 3-of-14 shooting (0-for-7 from 3).

Without Walker, veteran guard Marcus Smart will be counted on to step up as he did Friday night when he dropped 23 points while shooting 8-for-11 from the field. Another big night from Jayson Tatum (50 points in Game 3) wouldn't hurt either.

Tip-off for Celtics vs. Nets Game 3 is set for 7 p.m. ET on NBC Sports Boston.