Nene suffered a left groin injury in the opening minutes of Game 4.
Nene went directly to a hospital to have an MRI.
"We'll have a better handle on it (after the MRI), but he pulled his groin pretty good," Mike D'Antoni said after the game, the result of which knotted the series at 2-2. "We'll see. I don't have any more than that."
Nene had been averaging 10.8 points and 5.3 rebounds in the playoffs.