Regardless of the results of this week's year-end championships in Istanbul, there is no true world No. 1 in tennis this year.
In another stunning upset, Maria Sharapova, the 2006 U.S. Open champion, was ousted by No. 26 seed Flavia Pennetta, 6-3, 3-6, 6-4 Friday.
The early losses of No. 3 Maria Sharapova, No. 5 Petra Kvitova, No. 6 Li Na and No. 8 Marion Bartoli, above, was one of the themes of week one.
What's good for the heart is good for your game? Caroline Wozniacki and Rory McIlroy are the latest high-profile couple on the global sports landscape.
Maria Sharapova, the 2006 U.S. Open champ, is enjoying her highest world ranking since her return from a 2008 injury. But Serena's still the favorite.
With older stars fading, the new Wimbledon champ makes a statement for the younger generation, just in the nick of time.
Sharapova, with three Grand Slam titles, is the only former champion remaining in the field after all of Monday's upsets.
Women's tennis lacks dominant players and compelling rivalries. Will someone take advantage and emerge as the new star?