Team spokesman Arthur Triche said Thursday that Williams is listed as day to day.
Williams did not travel with the team for Friday night's game at Minnesota after injuring his right knee Wednesday night in a win over the Detroit Pistons. He left the game in the fourth quarter after landing hard on his right knee in a battle with Greg Monroe for a loose ball.
There were concerns Williams might have had a more serious injury.
Williams, the Hawks' starting small forward, is averaging 10.8 points and 6.0 rebounds.
The Hawks are also expected to be without Williams' top backup, Maurice Evans, against the Timberwolves. Evans has missed four straight games with a right knee injury.
Guard Jamal Crawford, who missed the Detroit game with a turf toe injury, is making the trip to Minnesota. His status for the game is uncertain.