Boston -- Tim Duncan and reserve Matt Bonner scored 23 points apiece Sunday, pacing San Antonio to a 105-99 win over Boston.
Bonner scored 16 points in the first half and, overall, sank 10-of-17 shots (3-of-6 3-pointers). He also had eight rebounds, while Duncan had 13.
Bonner wasn't the only San Antonio bench player to play a big role for the Spurs, who won for the fifth time in their last six outings. Roger Mason's 3-pointer with 20 seconds left in the fourth period erased a 93-92 deficit.
Mason finished with 11 points.
Manu Ginbobli added 19 with three rebounds and three assists for the Spurs, who lost a home-and-home series to the Celtics last season.
San Antonio led 60-52 at the break.
Kevin Garnett led Boston with 26 points, 12 rebounds and four assists. Paul Pierce added 19 with eight rebounds, Ray Allen 18 points, Tony Allen 11 and Kendrick Perkins 10. Rajon Rondo had 16 assists for the Celtics, who lost back-to-back home games for the first time this season.
Copyright 2009 by United Press International.