Power 100 rank: 40
Rank last year: Unranked
Most recent notable achievement: Finished 2011 ranked No. 1 on WTA Tour
Key sponsors: Adidas, Yonex, Turkish Airlines, Oriflame
Why she’s on the list: Caroline Wozniacki was the top-ranked player on the WTA Tour, until Kim Clijsters beat her at the Australian Open. Wozniacki still hasn’t won a Grand Slam tournament. She did make the finals of the U.S. Open in 2009 and the semifinals of both the U.S. Open and Australian Open last year. She’s gorgeous, marketable, and dating golfing upstart Rory McIlroy for a great match off the court.
Photograph by Greg Wood/AFP/Getty Images