NEW YORK - Olympic champion Elena Dementieva showed her mettle at the U.S. Open, rallying in the second set Monday to beat Akgul Amanmuradova 6-4, 7-5 to start what’s expected to be a wide-open tournament.

Back from Beijing with her gold, Dementieva won the final four games. The fifth-seeded Russian was glad to win quickly and give her mind and body a break.

“It’s very hard not to think about the Olympic Games,” Dementieva said. “Very difficult to refocus. I mean, all my thinking is there in Beijing.”

Former champions Lindsay Davenport and Svetlana Kuznetsova and fourth-seeded David Ferrer also opened with straight-sets victories. Many of the stars were in a hurry — they wanted to beat the rain in the forecast.

The final Grand Slam event of the season figured to be a scramble, especially on the women’s side. Justine Henin retired and is not back to defend her title and Maria Sharapova is out with an injured shoulder.

Six different women have won the U.S. Open in the last seven years, and Dementieva is seeking her first major championship. But to her, the Olympic singles title counts.

“The biggest goal for the year was Beijing,” she said. “In Russia, if you stop anyone in the street and ask what is a Grand Slam, I don’t think many people can tell you. But everyone knows the Olympic Games. There is nothing bigger.”

During a quick stopover in Moscow to see her mom, she found out how much the gold meant.

“People just come to me and say, ’Oh, I’m happy for you. You’re always losing in the final. It’s so great that you finally win something big,”’ she said.

Dementieva put together a workmanlike win over Amanmuradova. Her opponent from Uzbekistan served for the second ahead 5-3, but Dementieva still had enough energy.

Slideshow   The Week in Sports Pictures The Giants on top of the football world, getting ready for the London Olympics and more. more photos

“I don’t know what is best, to be a little bit tired but very comfortable and very positive, or to be fresh and not play in the Olympic Games.”

No. 2 seed Jelena Jankovic advanced with a 6-3, 6-1 victory over American CoCo Vandeweghe.

Li Na, who beat Venus Williams in Beijing, beat Shahar Peer of Israel 2-6, 6-0, 6-1. The No. 23-seeded Davenport defeated Aleksandra Wozniak of Canada, 6-4, 6-2 and No. 3 Kuznetsova beat Zhang Shuai of China 6-4, 6-2.