Hawks forward Marvin Williams isn't sure that he'll be able to play in Game Seven against the Celtics on Sunday afternoon because of a sore knee, according to the Atlanta Journal-Constitution.

He was hurt in the fourth quarter of the team's Game Six win over Boston on Friday night. He participated in a walkthrough with his team on Saturday, but his knee is still constantly being iced and sore.

"It's pretty sore right now," said Williams. "As of right now, the trainers list me as doubtful. I'll do the best I can to get as much treatment as I can and see if I can play tomorrow."

Coach Mike Woodson is still hopeful that Williams, the key in Game Six, will be able to take the floor.

"My gut says Marvin is going to play," Woodson said. "This is Game 7. He's put all his hard work from this summer into the regular season, and now he's got Game 7 with the best team in the league."