Sixth-seeded Li Na of China beat Ukraine's Mariya Koryttseva 7-6 (6), 6-3 yesterday to reach the quarterfinals of the Fortis Championships in Luxembourg.

However, second seed Anna Chakvetadze of Russia was upset by Czech Iveta Benesova 2-6, 4-6.

Fourth-seeded Caroline Wozniacki also advanced to the last eight. The Danish star easily beat Li's compatriot Peng Shuai 6-4, 6-4.

In a first-round encounter, Anna-Lena Groenefeld of Germany beat Belgian Yanina Wickmayer 7-5, 6-4

On Tuesday, top-seeded Elena Dementieva beat Tatjana Malek of Germany 7-6 (5), 6-2 to reach the second round.

The Olympic champion from Russia will next face Gisela Dulko of Argentina, who defeated Tathiana Garbin of Italy 6-4, 6-2.

In Linz, Austria, third-seeded Agnieszka Radwanska reached the quarterfinals of the Generali Ladies after beating Kaia Kanepi of Estonia 6-2, 6-4 yesterday.

The 10th-ranked Pole has won three WTA Tour titles this season and is competing to qualify for the season-ending Sony Ericsson Championships in Doha, Qatar.

Radwanska broke Kanepi in the opening game of both sets and stayed in control throughout.

Radwanska, who had a bye in the first round, will next play either fifth-seeded former champion Nadia Petrova of Russia or Slovenia's Katarina Srebotnik.

Flavia Pennetta continued her recent run of good results by beating Agnes Szavay of Hungary 6-1, 6-2 in a first-round match.

The seventh-seeded Italian, who reached the final of the Zurich Open last week, dropped only three points on serve in the opening set and broke Szavay on six occasions.

In St. Petersburg, Russia, Fernando Verdasco beat Latvian wildcard Karlis Lejnieks 6-1, 6-3 yesterday to advance to the quarterfinals of the St. Petersburg Open, while Nikolay Davydenko pulled out with a wrist injury.