DALLAS (AP) _ Tim Duncan had 29 points and 12 rebounds as the San Antonio Spurs won for only the second time in their last six games, 111-93 over the Dallas Mavericks on Tuesday night.

Avery Johnson added 16 points and David Robinson had 10 points and nine rebounds for the slumping NBA champs, who are 2-4 over their last six games after a 14-3 start.

Cedric Ceballos' 27 points and 10 rebounds paced the Mavericks, losers of four of their last five games.

Michael Finley had 15 points for Dallas but missed 10 of 15 field goal attempts. Dallas' Robert Pack added 14 points and eight assists.

Mavericks power forward Gary Trent had 12 points and four rebounds, all in the first half, in his first game of the season after missing 22 due to a hamstring injury. Trent went scoreless in seven minutes in the second half.

Chucky Brown scored 12 of San Antonio's 32 third-quarter points and Duncan added nine as the Spurs took an 83-70 advantage into the final quarter.

Ex-Maverick Samaki Walker and Duncan scored the first two field goals of the fourth quarter for an 87-70 lead, and the Mavericks never got closer than 13 points the rest of the way.

Notes: San Antonio has a 36-7 record against Dallas in the last 10 seasons. ... Mavericks coach Don Nelson says he will limit Trent's minutes until Trent gets into game shape. Trent played 23 minutes on Tuesday night ... Dallas hasn't outrebounded an opponent in any of its 23 games. The Spurs held a 51-38 rebounding edge.