Joseph leaves with hyperextended knee

LAS VEGAS -- Celtics rookie forward Kris Joseph hyperextended his left knee during the first half of Boston's 79-74 victory over the Chicago Bulls on Tuesday and did not return.

Team officials offered no update on his status after the game, leaving him questionable for Thursday's tilt with the Sacramento Kings (6:30 p.m. ET). Joseph and the rest of the Celtics will have the day off on Wednesday.