SAN ANTONIO, Jan. 4 (Ticker) -- Double-doubles by Tim Duncan and home victories by the San Antonio Spurs have become a happy routine.

Duncan scored 18 points and grabbed 13 rebounds and Tony Parker added 18 points as the Spurs won their 10th consecutive home game, a 106-75 triumph over the struggling Portland Trail Blazers.

NBA TV highlights from
Trail Blazers-Spurs:
A two-time NBA Most Valuable Player, Duncan registered his league-leading 24th double-double. He also led six scorers in double figures and helped the reigning champions improve to 15-1 at the SBC Center.

In their most lopsided victory of the season, the Spurs had a 57-30 rebounding edge for the game and outscored Portland, 28-11, in the fourth quarter. Duncan grabbed his 7,500th career rebound and set a season high with seven boards off the offensive glass.

"It was a great defensive effort overall," Duncan said. "We had a solid night defensively and that helped keep their score down. We are starting to get things worked out."

Duncan scored nine points in the second quarter, including seven straight for the Spurs, and Michael Finley and Manu Ginobili nailed 3-pointers to help give San Antonio a 53-42 halftime lead.

In his fourth game back after missing eight with a sprained right foot, Ginobili came off the bench to make 6-of-10 shots and score 15 points.

"I'm trying to test my ankle and see how I feel," Ginobili said. "I am trying to see how I feel around the rim. Overall, I am feeling pretty good."

The Spurs gradually pulled away in the third quarter as Parker scored eight points. Defensive demon Bruce Bowen made two shots from the arc for a 78-64 edge entering the final period.

"We had a good performance tonight out of a lot of people," Spurs coach Gregg Popovich said. "We had good focus all night long."

San Antonio limited Portland to one basket in the final 7:35, finishing with an 18-5 run as Nazr Mohammed scored seven straight points.

Rasho Nesterovic tied a season high with 12 points and Mohammed and Finley added 11 each for the Spurs, who have the best record in the Western Conference (25-7).

"(Mohammed and Nesterovic) were great for us tonight," Duncan said. "They played great throughout the entire game."

Rookie reserve Jarrett Jack scored 15 points, Juan Dixon added 12 and Ruben Patterson 11 for Portland, which has dropped four straight and 15 of 20.

"When it's difficult for us to score, we just can't dig down and scrap," Trail Blazers coach Nate McMillan said. "We talked about pulling together. It's easier to be together when things are going well. But when things are going bad, that's when you need to pull together and I don't see us doing that out on the floor during the rough times."