LAS VEGAS — Blazers rookie Caleb Swanigan had another superb summer-league performance Tuesday, notching his second double-double in three games, amassing 19 points and 13 rebounds in a 99-85 loss to the San Antonio Spurs.

Swanigan, who was selected by the Blazers with the 26th pick in the June draft, reversed two games of poor shooting from the field (he had made 8 of 24 shots going into Tuesday's game) by making 8 of 13 field goals. He also had two steals and a block, and turned the ball over four times.

The game was marred by two injuries. Rookie center Zach Collins, the 10th overall pick in June's draft, played 11 minutes before leaving the game with a right quad injury. And Pat Connaughton left the game in the second quarter with a left hamstring injury and did not return.

BOX SCORE: Spurs 99, Trail Blazers 85

Collins had four points and four rebounds and Connaughton finished with seven points and three assists.

After the game, Collins told media that he injured his leg in Sunday's game. He had been receiving treatment but the injury flared up during Tuesday's game. He said he hopes to play in the Blazers' next game on Wednesday. Connaughton also said he hopes to play Wednesday.

Jake Layman missed eight of nine shots, including both his 3-point attempts, and finished with three points. The Blazers' sophomore forward, a second-round pick in 2016, has made only 6 of 30 shots (20 percent) in the Blazers' three summer-league games.

HIGHLIGHTS: Swanigan notches double-double in Blazers' loss

... But Biggie did a lot of Biggie things.

— Trail Blazers (@trailblazers) July 11, 2017

Portland will play again Wednesday as tournament play begins in Las Vegas. Game time and opponent has yet to be determined.

The Spurs were led by Bryn Forbes, who hit six 3-pointers and scored 35 points.

VIDEO: In-game interview with Blazers coach Terry Stotts