Carmelo Anthony injures right ankle stepping on a referee

Carmelo Anthony injured his right ankle late in the second quarter vs. the Celtics, stepping on a referee's foot:

Looked like Carmelo Anthony slipped on either a wet spot or the ref or both. Left to locker room. pic.twitter.com/NuGExB9nZ7

— KL Chouinard (@KLChouinard) January 13, 2016

He tested it at halftime, but needed to come out after the first possession of the third quarter. He then headed back to the locker room and will not return. X-rays were negative:

X-rays on Carmelo Anthony's right ankle were negative. He will not return with a sprained right ankle.

— NY_KnicksPR (@NY_KnicksPR) January 13, 2016