The initial x-rays on Joakim Noah's injured left ankle were negative, but the Bulls haven't ruled out the possibility of a fracture.
Noah left the arena on crutches and in an air cast.
Noah gruesomely turned his left ankle as he led a fast break and stepped on Andre Iguodala's foot with 7 minutes, 57 seconds left in the third.
Noah returned in the fourth quarter despite being unable to barely run.
"He wanted to give it a shot," Tom Thibodeau said. "You could see he couldn't move. First, he has to be cleared by (athletic trainer Fred Tedeschi). He felt like he could go. Once we saw he was having a hard time moving, that was it."