Late in the third quarter of Thursday's loss to the Suns, RJ Barrett drove to the basket but ended up taking an awkward step off his right foot.
He came up hobbling a bit after the play, and after trying to stick it out and play defense, he asked to come out of the game.
"I haven't seen it yet. But what I heard was I kind of twisted my left (ankle) a little bit on one step, so then on the right step I tried to fix it," Barrett explained after the game.
"I tried to run down on the other end but then I tried to play defense, and it just hurt too much on both sides so I just decided to call it."
The Knicks later ruled the injury a right ankle sprain, and Barrett did no return to game action as the Knicks fell to the Suns 121-98.
After the game, Barrett didn't have much more to add to the diagnosis, saying that the team will learn more on Friday.
"They're going to reevaluate it tomorrow," Barrett said. "That's all I know. … It hurts. I don't know, I've never really been hurt before."
"No clue (about the severity) yet, it just hurts and we'll see what happens with the swelling and everything and then come in tomorrow and evaluate it."
Knicks interim head coach Mike Miller echoed those sentiments, saying he hadn't had a chance to talk things over with the Knicks medical staff as of yet.
Barrett has proven to be a durable player for the Knicks during his rookie season. He's appeared in 41 of the team's 42 games, with the only game he missed occurring due to an illness.
As of now, there's no knowing if he will be able to play on Saturday when the Knicks host the Philadelphia 76ers.
"I don't really know when I ever missed a game. I can't remember the last time," said Barrett. "I just feel like we play so many games, it was bound to happen."
Barrett's night came to an end with seven points, three rebounds, and two assists in 24 minutes. Any time missed by Barrett would certainly hurt the Knicks, as he's averaged 18.4 points in his previous five games, including two 20-point outings.