It was after ten minutes of play that the Los Angeles Lakers superstar got an opponent over him in a duel and was left in pain.
He first played on and put a third, but then asked for a timeout and left the match.
On the way out of the field, he angrily knocked over a chair.
It is unclear what the status is with LeBron, according to ESPN he will undergo an X-ray of his right foot.
The 36-year-old is chasing his fifth MVP title, the prize for the best player of the season, and is seen as one of the top players of all time.
The Atlanta Hawks won the game 99-94.