• Serbia's Ana Ivanovic. (AFP PHOTO/WILLIAM)
  • Maria Kirilenko of Russia. (Photo by Graham Denholm/Getty Images)
  • Russia's Maria Sharapova . (AFP PHOTO/MANAN VATSYAYANA)
  • Germany's Julia Goerges. (AFP PHOTO / PAUL CROCK)
  • Netherland's Arantxa Rus . (AFP PHOTO/PETER PARKS)
  • Germany's Angelique Kerber. (AFP PHOTO / PAUL CROCK)
  • Camila Giorgi of Italy. (AFP PHOTO/PAUL CROCK)
  • Czech Republic's Petra Kvitova. (AFP PHOTO/MANAN VATSYAYANA)
  • Serena Williams of the United States. (Michael Dodge/Getty Images)
  • Croatia's Mirjana Lucic-Baroni. (AFP PHOTO / WILLIAM WEST)
  • Sloane Stephens of the US. (AFP PHOTO / MANAN VATSYAYANA)
  • Venus Williams of the US. (AFP PHOTO / Paul CROCK IMAGE)
  • Yung-Jan Chan of China. (AFP PHOTO/Fiona HAMILTON)
  • Poland's Urszula Radwanska . (AFP PHOTO/MANAN VATSYAYANA)
  • Ukraine's Lesia Tsurenko. (AFP PHOTO / WILLIAM WEST)
  • Australia's Jarmila Gajdosova. (AFP PHOTO/PETER PARKS)
  • Belgium's Yanina Wickmayer. (AFP PHOTO/PETER PARKS)
  • Victoria Azarenka of Belarus. (AFP PHOTO/William WEST IMAGE)
  • Daniela Hantuchova of Slovakia queries a line-call with the umpire during her loss to Japan's Ayumi Morita at the Sydney International tennis event on January 7, 2013. IMAGE STRICTLY RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE AFP PHOTO / Greg WOOD
  • Caroline Wozniacki of Denmark. (AFP Photo)
  • Ana Ivanovic of Serbia takes part in a practice session for the upcoming Australian Open tennis tournament in Melbourne on January 12, 2013. The first Grand Slam tennis tournament of the year is set to run from January 14 to 27. AFP PHOTO / Paul CROCK IMAGE STRICTLY RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE