A week after small forward James Posey returned from injury, the Heat has lost another starter. Jason Williams will not play tonight against Philadelphia after bruising his right knee Tuesday against the Hornets, coach Stan Van Gundy said.

Williams said he was uncertain about when he can play. For now, the Heat is listing him as day-to-day. Williams sat out Thursday's practice and was limping afterward. He did not return to Tuesday's game after a fourth-quarter, knee-to-knee collision with Hornets forward Chris Andersen.

Gary Payton will start in Williams' absence, and starting shooting guard Dwyane Wade will play point guard at times.

As a starter, ''I have to post up a little more, [and] I've got to go to the basket a little more,'' Payton said.