BEIJING, March 22 -- Andy Roddick beat defending champion Novak Djokovic 6-3, 6-2 at the BNP Paribas Open in Indian Wells, California, on Friday and will meet No. 1 Rafael Nadal in the semifinals. Nadal, trying for his second Indian Wells title in three years, rolled to a 6-2, 6-4 victory over Juan Martin del Potro.

No. 2 Roger Federer, who won the title for three consecutive years from 2004-06, faces No. 4 Andy Murray in the other semifinal.

Meanwhile, defending champion Ana Ivanovic of Serbia and Russia's Vera Zvonareva earned spots in the women's final.

Fifth-seeded Ivanovic defeated Anastasia Pavlyuchenkova 6-2, 6-3, while fourth-seeded Zvonareva beat Victoria Azarenka 6-3, 6-3.

Seventh-seeded Roddick's game was solid all-around against third-seeded Djokovic. The error-prone Serbian made 30 unforced errors, 18 more than his American opponent.

The semifinals appearance will be Roddick's third at Indian Wells. He lost to Lleyton Hewitt in 2005 and to Nadal in 2007.

Djokovic was extremely disappointed with his effort.

"It's just one of those days when you really don't feel comfortable on the court," he said. "I just didn't have any momentum - no feel for the ball, no movement. Just no solutions. It was all me making an incredible amount of unforced errors.

"This was one of the worst matches, certainly, I played."

Nadal covered the court extremely well in his win over sixth-seeded del Potro, keeping the ball in play even when the Argentine had him racing from side to side. Often, Nadal would be on the run and slash a winner crosscourt or down the line. He hit 25 winners, 13 with his forehand.

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