Caroline Wozniacki of Denmark serves during her second round match against Italy's Roberta Vinci in Rogers Cup singles action at the Rexall Center in Toronto, Canada on August 10, 2011. Vinci upset
Wozniacki serves up first Australian Open final
Caroline Wozniacki of Denmark hits a serve in the match against... News Photo - Getty Images
Caroline Wozniacki serves en route to her semifinal victory in Doha over Monica Puig; Getty Images | Tennismash
Caroline Wozniacki Serve High Resolution Stock Photography and Images - Alamy
Wozniacki ousts Ahn in Aussie opener
Caroline Wozniacki made fun of herself after hitting the worst serve of the year | For The Win
Wozniacki wants last hurrah after bravery loses out to brittleness | Caroline Wozniacki | The Guardian