Gregg Popovich remains unsure when Kawhi Leonard will be ready to play.

"I don't know when he's going to feel, he and his group are going to feel like they're ready to go," Popovich said Sunday before a game against Houston. "If I knew, he'd be here. When he and his group feel he's ready, he'll be ready."

Leonard has missed all but nine games this season while nursing right quadriceps tendinopathy. 

Leonard recently returned to New York to work with his own team of doctors for the second time this season.

The Spurs' medical staff has been present for both of Leonard's extended stays in New York to stay updated on his progress.

Leonard still hopes to return this season.

"He's trying to get well," Popovich said. "Of course that's the purpose [of his stay in New York], to get well, that's what he's doing. That's what rehab is. He's up there going to Broadway shows and everything?"