Two-time defending champion Lisa Raymond continued her winning ways in Memphis with a 6-2, 6-3 victory over Russia's Galina Voskoboeva. The 30-year-old Raymond, who reached the quarterfinals at this year's Australian Open after defeating Venus Williams earlier in the tournament, took just 1 hour, 6 minutes to reach the quarterfinals, where she will meet fellow American Lindsay Lee-Waters, a 6-3, 6-3 winner over Martina Sucha.

"I love coming back here," said Raymond, the World No. 25. "I love playing in Memphis. Anytime you come back to defend a title, you put a little extra pressure on yourself and you want to perform, not only for yourself, but for the people and the crowd. The people have supported me the last couple of years.

"It was a good match for me. I didn't know her. I came here yesterday to watch a little bit and see how she played. It was a good one to get through and onto the next round."

Illness

Meanwhile, Maria Sharapova's second round match lasted just 11 minutes when her opponent, fellow Russian Tatiana Panova, retired just three games into the match after complaining of an illness.

"I've been sick for three or four days," said Panova. "I thought I would be able to play the whole match, but there was nothing that I could do. After the first game, I didn't think I could do it for the whole match."

Sharapova, the No. 3 seed, now meets Amy Frazier in the next round in what will be a battle between the youngest and oldest players in the draw. Sharapova, the 16-year-old, said: "I didn't really notice anything before the match, but you never know what can happen. It's very difficult at that stage when you first get sick.

"I have a tough one in the next round against Frazier. She's a very solid player. She's a veteran on the tour. I'm going to have to step up my game a little bit in that match. I'm going to have to do that in order to win. I played her once more than a year ago."

Elsewhere in the second round, fifth seed Ashley Harkleroad went down at the hands of Argentina's Gisela Dulko, whose 7-5, 7-6(3) victory earned her a quarterfinal meeting with top seed Vera Zvonareva.

"I didn't expect to come here in the beginning," said Dulko. "I was playing in a tournament in Midland (Mich.). I got in the main draw in the last minute, and now I'm in the quarterfinal. It's very nice. I'm playing good."

Harkleroad said: "It's disappointing, but there's really nothing I could have done when somebody's playing tennis like that."