Russia's Maria Kirilenko hits a return to Serena Williams of the US during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 21, 2013. (AP Photo/Dita Alangkara)

Photo by: Dita Alangkara

Russia's Maria Kirilenko hits a return to Serena Williams of the US during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 21, 2013. (AP Photo/Dita Alangkara)