Enes Kanter suffered a fractured right forearm punching his hand on a chair in the second quarter of Oklahoma City's win over Dallas.
Kanter could miss up to two months.
The Thunder will re-evaluate Kanter and officially update his timetable on Friday.
Kanter had slapped the floor in frustration a few minutes prior, walked to the bench during a timeout and slammed his fist into the padded chair. But as he brought his arm down, the folding chair flipped up slightly and Kanter caught his forearm on the metal edge.
X-rays confirmed the fracture.
"It's tough, man, especially to do it the way he did it, it's very unfortunate," Russell Westbrook said. "He's a strong man and he'll be back better.
Things happen. If he could take it back he definitely would," Westbrook said. "But I think now we have to look forward and try to figure out what the positive things are and get him back as soon as possible."
Via Royce Young/ESPN
