Wozniacki reaches Dubai semis

Former world No. 1 Caroline Wozniacki was a hard-fought quarterfinal winner Thursday at the $2 million Dubai Tennis Championships.

The eighth-seeded Danish star fought back to beat former Wimbledon runner-up and French wild card Marion Bartoli 4-6, 6-1, 6-4 on the hardcourts at Dubai Tennis Stadium.

Wozniacki was the Dubai champion two years ago.

Meanwhile, fifth-seeded 2012 French Open runner-up Sara Errani of Italy held off Russian Nadia Petrova 6-4, 0-6, 6-3 and Errani's good friend Roberta Vinci ousted seventh-seeded former U.S. Open champion Samantha Stosur 6-2, 6-4. The struggling Stosur misfired for 28 unforced errors in the setback.

Errani and Vinci, who are currently the world's No. 1 doubles team, will square off against each other in Friday's semifinals.

The 17th-ranked Vinci said her recent success in doubles has helped with her ever-improving singles play.

"Probably in doubles, you can try also something that you can play in singles," Vinci said. "I probably play more relaxed and then I play better in the singles."