The Spurs spoiled another big performance from veteran Tim Duncan, who had a double-double of 32 points and 10 rebounds in the loss. The Spurs definitely needed rest due to tired and injured players. The Spurs sat Tim Duncan and Manu Ginobili for rest, and Tony Parker and Kawhi Leonard for injuries in Saturday's loss to the Dallas Mavericks.
San Antonio has now lost 3 consecutive triple-overtime games.
Wesley Matthews added 16 points for the Trail Blazers, who after Saturday's win, have won 5 straight games and sit at 22-6 on the season.
Danny Green had 27 points, including a 3 that sent the game into overtime, and Tiago Splitter scored 14 for the Spurs. After Saturday's loss to the Mavs, San Antonio sits with a record of 17-11.
Both teams will face tough challenges Monday night, with the Spurs hosting the Los Angeles Clippers, while the Trail Blazers will visit the Houston Rockets.