No, I haven't watched every single Blu-ray title and no, I am not going to go rent that one movie that everyone knows looks bad.

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Caroline Wozniacki, whom Azarenka succeeded as No. 1, has fallen to No. 9 and hasn't won a title in nine months.

WSJ: Victoria Azarenka: One Is a Lonely Number in Women's Tennis

As for Williams, she still has a chance of reclaiming the World No. 1 ranking if defending champion Azarenka doesn't retain her title or if Maria Sharapova loses her semifinal against Li Na.

WSJ: Serena Williams Knocked Out of Australian Open