Against the Blazers Mills finished with seven points.
The Blazers went up 17-10 midway through the opening quarter after Batum's 3-pointer.
Rookie Meyers Leonard's tip-in extended the lead to 26-16, but the Spurs answered with consecutive 3-pointers by Jackson, Ginobili and Neal. Ginobili then made a free throw to tie it at 26.
Lillard, the sixth overall pick in the June draft, took over at the start of the second quarter, scoring eight points in a 10-4 run that put Portland up 42-32. Lillard had a fast-break dunk off a steal and two 3-pointers.
Lillard finished the half with a pull-up jumper to give the Blazers a 52-43 lead at the break.
The Blazers got a scare in the second half when Matthews fell awkwardly under the basket. He was face down on the floor for a while before heading to the locker room. A short time later he returned to the bench, apparently unhurt.
The Spurs kept pressure on the Blazers, closing to 67-64 on Neal's pull-up jumper. Part of the problem for Portland was its reserves, who managed just four points in the game.
Matthews' putback made it 79-71, but Ginobili answered with a quick 10-foot jumper and the Blazers carried a 79-73 lead into the final quarter.
The Spurs opened the quarter with a 14-0 run, pulling even on Neal's jumper and then taking the 81-79 lead on Danny Green's 22-footer. Neal and Green added consecutive 3-pointers to put the Spurs ahead 87-79.
"It was fun beginning the fourth quarter sitting on the bench watching our guys get back in that game. Gary and Danny turned things around for us," Duncan said.
Aldridge finished with a season-high 29 points, seven assists and four blocks for the Blazers. He joins four players with that many points, assists and blocks since the 2006-07 season: Russell Westbrook. Dwyane Wade, LeBron James and Ginobili.
NOTES: Some of the players, including Aldridge and San Antonio's Boris Diaw, sported special red, white and blue headbands to honor armed forces veterans. ... Going into the game, San Antonio was allowing opponents an average of 91.7 points a game.