Russell Westbrook vowed revenge against Zaza Pachulia after being hit with a hard foul in the Oklahoma City Thunder's loss to the Golden State Warriors.
The Thunder were beaten 121-100 by the Warriors in the second meeting between the teams since Kevin Durant's decision to leave Oklahoma City for Golden State in the offseason.
Golden State also won the first matchup 122-96 but Wednesday's defeat left a particularly bitter taste in Westbrook's mouth.
With just four seconds remaining in the second quarter, Warriors center Pachulia knocked Westbrook to the floor. As Westbrook laid there in pain, Pachulia stood over him.
The officials originally called it a common foul but determined it a flagrant foul on review because Pachulia made contact to Westbrook's head.
Westbrook told reporters after the game he did not realise Pachulia was standing over him until he was told at the end of the game.
"I'm going to get his a** back, straight up... I don't play that game," Westbrook said. "I'm going to get his a** back, whenever that is, I don't know when it's going to be but I don't play that game."
Westbrook made it clear there has been no improvement in relations with former team-mate Durant, as he was seen telling Enes Kanter not to shake hands with the 2014 MVP after the final buzzer.
Asked by reporters if he is on speaking terms with Durant, Westbrook replied: "Nah."
The Warriors' final two regular-season games with the Thunder take place in Oklahoma City on February 11 and March 20.