10/03/2011 06:37 EDT | Updated 12/03/2011 05:12 EST

Top-ranked Caroline Wozniacki beats Lucie Hradecka of Czech Republic in 3 sets at China Open

BEIJING, China - Caroline Wozniacki rallied from a set down to beat Lucie Hradecka of Czech Republic 3-6, 6-0, 7-5 Monday at the China Open.

The top-ranked Dane struggled at the start against the big-serving Czech, who had nine aces to Wozniacki's two. But Wozniacki improved in the second set as Hradecka's first serves increasingly hit the net, saving eight of 12 break points.

"It wasn't a pretty match, but I'm through and that's what's most important," said Wozniacki, the defending champion.

Third-seeded Klara Zakopalova of the Czech Republic defeated Nadia Petrova of Russia 6-3, 6-7 (3), 6-1, while Maria Kirilenko of Russia beat Julia Goerges of Germany 7-6 (9), 6-3.

Also, wild-card entry Zheng Jie of China outlasted Alberta Brianti of Italy 4-6, 6-1, 7-5, qualifier Virginie Razzano of France defeated Gisela Dulko of Argentina 6-2, 6-3, and Tamira Paszek of Austria beat Petra Cetkovska of the Czech Republic 1-6, 6-4, 6-2.

In the men's tournament, Marin Cilic of Croatia defeated Chinese wild card Di Wu 6-2, 6-0, Feliciano Lopez of Spain beat Marsel Ilhan of Turkey 6-2, 7-6 (6), Fernando Verdasco of Spain downed Michael Llodra of France 6-2, 6-4, and Florian Mayer of Germany beat Albert Ramos of Spain 6-2, 6-4.