Teen Nicole Vaidisova Wins Third Straight WTA Title at Bangkok

It appeared to be the best chance for Petrova, now 0-4 in career finals, to end her drought after beating Vaidisova in their previous meeting last month at the US Open.

"It feels good," Vaidisova said. "I don't think it could get any better than this. I was pretty consistent today, and I'm happy with the way I played overall. I think I challenged her today and showed that I could beat a higher-ranked player when I'm on my game."

Petrova attributed the loss to the new injury du jour on the women's tour, a chest muscle malady.

"I couldn't serve today," Petrova said. "I've been struggling with a right pectoral strain since my last tournament, and yesterday after my three set match it seemed to get worse. I tried to fight through it, but in the third set it really started to hurt. Then my serve was just very off."

It was the third consecutive title for Vaidisova after Seoul and Tokyo, with the Czech becoming the sixth WTA player to win five career titles before her 17th birthday, joining Tracy Austin, Andrea Jaeger, Monica Seles, Jennifer Capriati and Martina Hingis.

Petrova remains the only Top 20-ranked players without a career singles title.

No. 2 seeds Shinobu Asagoe and Gisela Dulko won the doubles title, defeating top seeds Conchita Martinez and Virginia Ruano Pascual of Spain 6-1, 7-5 for their first title as a team.