"It's too bad," Popovich said, per Tom Orsborn of the San Antonio Express-News. "He was starting to get back into form a little bit after playing a couple of games."
Injuries have plagued Leonard recently. He missed the Spurs' first 27 games due to quadriceps tendinopathy, which apparently had been bothering him since the 2016-17 season, per Orsborn. He has only played eight games this season, averaging 15.9 points per game.
The 26-year-old also missed time in the postseason last spring because of a sprained ankle, which in part led to the Spurs' demise in the Western Conference Finals. He has missed at least eight games in each of the past six seasons and averaged just 66.3 games entering this year.
When healthy, Leonard is one of the best all-around players in the NBA. The two-time All-Star is coming off a career year, during which he averaged 25.5 points and 5.8 rebounds per game to finish third in MVP voting. He has also won two Defensive Player of the Year awards.