Top-seeded Amelie Mauresmo of France beat Varvara Lepchenko of Uzbekistan 6-4, 6-1 on Wednesday to reach the quarter-finals of the Strasbourg International.

Second-seeded Jelena Jankovic of Serbia, No. 4 Li Na of China and No. 5 Marion Bartoli of France also won their second-round matches without dropping a set, as did No. 6 Anabel Medina Garrigues of Spain, and No. 9 Emilie Loit of France.

Jankovic beat Thailand’s Tamarine Tanasugarn 6-3, 7-5, while Bartoli defeated Tatjana Malek of Germany 6-3, 6-3.

Li beat Russia’s Vera Dushevina 6-2, 6-3, while Medina Garrigues downed Alicia Molik of Australia, 6-2, 6-4, and Loit routed Lilia Osterloh of the US 6-1, 6-0 to set up a meeting with Mauresmo in Thursday’s quarter-finals.

Lleyton Hewitt and Andy Roddick both won in straight sets on Wednesday to advance to the quarter-finals of the Hypo Group International.

The fourth-seeded Hewitt needed five match points to defeat Potito Starace of Italy 6-4, 6-4, while the second-seeded Roddick downed Denmark’s Kristian Pless 6-4, 6-3.

Defending champion Nikolay Davydenko also advanced to the quarter-finals, beating Nicolas Lapentti of Ecuador, 6-4, 6-2.

Hewitt broke Starace in the first game and dropped just four points on his own serve to comfortably win the first set.

In the second, the Australian managed an early break again but had to fight off three break points when serving for the match at 5-4. He finally converted his fifth match point as Starace put a forehand wide.

Hewitt plays Diego Hartfield of Argentina in the quarter-finals. Hartfield defeated Vincent Spadea of the US 6-4, 7-6 (5) in a match that was interrupted because of rain.

Taiwanese women had mixed results in the qualifying round for the French Open in Paris on Wednesday, with Hsieh Su-wei beating France’s Stephanie Vongsouthi 6-3, 6-4, while Chuang Chia-jung lost 4-6, 4-6 to Anda Perianu of Romania.

Hsieh, ranked 125 in the world for women’s singles, was scheduled to play 17-year-old US player Madison Brengle yesterday afternoon.