The Spurs said he'll undergo an MRI exam Thursday, and at that point his status will be updated.
"It's not good," Spurs coach Gregg Popovich said in his postgame news conference after San Antonio evened the Western Conference semifinals at 1-1. Editor's Picks
Kawhi Leonard had 34 points, eight assists and seven rebounds, and the San Antonio Spurs overcame the loss of Tony Parker to beat the Houston Rockets 121-96 on Wednesday night.
Parker was carried off the court by teammates Dewayne Dedmon and Dejounte Murray after falling to the floor and grabbing his left knee and did not return. The injury became apparent after Parker's jump shot in the lane with 8:43 remaining in the fourth quarter, with the Spurs leading 97-83.
Parker could be seen grimacing in the tunnel as he was turned and carted off.
Meanwhile, Spurs owner Julianna Hawn Holt, who took over as CEO for her husband, Peter Holt, last March, rose from her courtside seat screaming, and walked toward an official before she was pulled back to her seat.