Under pressure to win the inaugural Danish Open in front of her hometown crowd, Wozniacki wobbled in the previous two rounds, and again needed three sets to get through on Saturday.

One time fifth-ranked Chakvetadze, who came through qualifying in Copenhagen, has been in resurgent form, and gave Wozniacki a tough test at the indoor hard court tournament.

Wozniacki, who is chasing her 8th WTA title, looked in the mood to finish the match quickly after cruising through the first set. Chakvetadze, though, broke Wozniacki three times in the second to force the match to a closely fought third.

Wozniacki eventually prevailed, despite Chakvetadze breaking to bring the scores level at 4-4 in the final set.

In Sunday's final, the third-ranked Wozniacki will face Klara Zakopalova after the Czech defeated second-seeded Li Na of China 6-3, 1-6, 6-4.

Zakopalova started strongly, breaking Li's first two service games of the match to win the first set.

Li recovered to take the second convincingly, after breaking Zakopalova three times. The final set was tighter, with the seventh-seeded player from the Czech Republic eventually serving out the final game for victory.

Wozniacki came out on top in three sets in her only other meeting with Zakopalova at the Japan Open in 2007.
 

In San Diego, California, French Open runner-up Samantha Stosur of Australia was ousted from the $700,000- WTA San Diego Open on Friday, losing a quarterfinal 6-4, 6-3 to Italian fifth seed Flavia Pennetta.

Second seed Stosur joined Serbian top seed Jelena Jankovic and Russian third seed Vera Zvonareva on the scrapheap at the $700,000 hardcourt tournament, a tuneup for the US Open that begins on Aug. 30.

Pennetta fired seven aces and blasted 19 winners past Stosur to book a semifinal berth against Svetlana Kuznetsova, who downed US teenager CoCo Vandeweghe 7-5, 6-2.

"It's a good feeling because she's one of the best players," Pennetta said. "She has had an unbelievable year. It's never easy to beat this kind of player."

Kuznetsova, who reached her first semi-final of 2010, said eventually her experience won out over the US youngster, who upset Zvonareva on Thursday night.

"I think I won by experience," Kuznetsova said. "I wasn't playing my best game. I think she was so confident (from Thursday). It took me time to break her up."

In a battle of unseeded players, Daniela Hantuchova of Slovakia beat Russian Alisa Kleybanova 2-6, 6-4, 6-3. In the semi-finals Hantuchova will face fourth-seeded Agnieszka Radwanska of Poland, who won the last nine games in a 6-2, 6-0 rout of seventh-seeded Israeli Shahar Peer.

While Stosur is one of the tour's top servers, she didn't muster an ace and had five double faults.

"She makes a lot of balls and runs everything down," Stosur said. "She really makes you work for every point you win. Sometimes that can be a little bit frustrating."

Vandeweghe, who hails from the San Diego area, took a 5-2 lead in the first set against Kuznetsova, riding the momentum of her victory the night before.

"I thought early on I was kind of beating her with my pace and the heaviness of the ball," she said.

But after Kuznetsova saved a set point, the Russian went on to win five straight games to take the first set.

She put together a string of four games in the second set to lead 5-1 and sealed the match in the eighth game on her third match point.