SAN ANTONIO, May 10 (Ticker) -- Ray Allen and the hobbled Seattle SuperSonics put up a game effort, but they again could not stop the San Antonio Spurs.

Reserve Manu Ginobili scored 28 points, Tim Duncan added 25 and Tony Parker 22 as the Spurs methodically posted a 108-91 triumph over the SuperSonics and opened a 2-0 cushion in their Western Conference semifinal series.

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In a 30-second span of the second quarter of the Spurs' 103-81 rout in Game One, the Sonics saw Allen and fellow perimeter threat Vladimir Radmanovic suffer sprained right ankles. While Radmanovic was lost for the series, Allen - who did not practice Monday - elected to play in this one and scored 25 points.

However, Allen and his teammates again had trouble defending the balanced Spurs offense. San Antonio, which shot 51 percent (35-of-69) in Game 1, connected on 52 percent in this one (38-of-72). Ginobili especially was impressive, sinking 9-of-11 shots from the field.

"I think we had two very solid performances," Ginobili said. "We did what we wanted. We prevented them from making so many threes, from running the fast break. Of course, we made mistakes, as always, because it's a game of mistakes. But overall, I think we did a very good job and we gotta try to play the same way over there."

Though the Sonics did a slightly better job defensively on Parker, who scored 29 points in Game 1, they could not stop Ginobili, who consistently bounded into the lane and drew fouls. He went 8-of-10 from the line.

"We didn't do a good job on him," Seattle coach Nate McMillan said. "Both of those guys love to go to the basket, and put their head down and go into the paint, so it's basically like playing two point guards. Tonight I thought we did a better job on Tony, but Ginobili got loose tonight, and you just can't stop one guy."

The Spurs, who led for all but the first couple of minutes, opened a 28-16 lead after one quarter behind 10 points on 4-of-5 shooting from Ginobili, who had just 10 points in Game 1. San Antonio led by as many as 18 points in the second quarter before settling for a 54-42 advantage at the break, but it led by at least eight points thereafter.

While San Antonio shot 53 percent (20-of-38) in the first half, it limited Seattle to just 38 percent (16-of-42) through two quarters and 42 percent overall (33-of-78).

"I think the key to our game is on the defensive end," Duncan said. "We did a great job contesting shots. We did a great job of getting back and getting in front of people. I thought they got too many offensive rebounds (17) and second-chance points (12) tonight - I'd like to clean that up for the next game - but all in all, defensively, that's where we're going to win games."

"(It was a) good win for us," Spurs coach Gregg Popovich said. "Obviously, any win in the playoffs is a good win, but I thought we played pretty well as a team defensively, and we had a lot of people take challenges."

Rashard Lewis scored 22 points and former Spur Antonio Daniels 16 off the bench for Seattle, which hosts Game 3 on Thursday.

"Ray and Rashard are both fantastic players," Popovich said of the Sonics' All-Stars. "There's no way to stop either one of them, you just try to limit them as much as you can. But I thought a lot of people tried to do that. They still scored, but I think overall I thought we did a decent job, and we'll have to back it up in Seattle."

Though the Spurs have won both games comfortably, McMillan said the series is by no means over.

"They won the first two in San Antonio," he said. "We go home now and we'll play in front of our home crowd. We still have an opportunity. They still have to win two more games. We'll make some adjustments again, and hopefully we'll get this thing right on Thursday."