PERTH, AUSTRALIA - JANUARY 04: Ana Ivanovic of Serbia celebrates after winning her singles match against Tatjana Melek of Germany during day seven of the Hopman Cup at Perth Arena on January 4, 2013 ... more 

PERTH, AUSTRALIA - JANUARY 04: Ana Ivanovic of Serbia celebrates after winning her singles match against Tatjana Melek of Germany during day seven of the Hopman Cup at Perth Arena on January 4, 2013 in Perth, Australia. (Photo by Will Russell/Getty Images) less