BOSTON - Kawhi Leonard scored nine points in the final 7:17 as San Antonio kept rolling with a spirited 109-103 win on Friday over the Boston Celtics that extended three winning streaks.
LaMarcus Aldridge clinched the Spurs come-from-behind victory with an offensive rebound and two free throws with 17 seconds remaining.
"It was a great win for us against the really active team," Spurs coach Gregg Popovich said.
The Spurs, who trailed by 14 points in the first half, improved to 13-3 on the season in front of a crowd of 18,600 at the Boston Garden arena.
San Antonio rallied for their eighth straight NBA win overall, their ninth in as many games on the road this season, and also beat Boston for the 10th straight time.
Leonard, who finished with 25 points, 10 rebounds and four assists, scored nine points in the fourth quarter.
Patty Mills tallied a season-best 19 points and rookie Davis Bertans and veteran David Lee added 15 points apiece.
That marked a career high for Bertans and season high for Lee, who also grabbed a season-high 12 rebounds.
Starters Danny Green and Aldridge scored 11 and 10 points, respectively.
Isaiah Thomas finished with 24 points and eight assists while Avery Bradley had 19 points and eight rebounds for the Celtics who had their three-game winning streak snapped.
Al Horford added 12 points, 10 rebounds and three blocks while Marcus Smart came off the bench to score nine points.
"I felt like we fought really hard all night," said Horford. "I think the stat sheets say their bench was the difference. They did a great job."
The Celtics used an 18-2 first-quarter run to grab a 24-10 lead.
Boston, coming off a three-game road trip, then went 5:51 without a point in the second quarter as San Antonio used a 12-0 burst to get back in the game.