Maria Sharapova, ranked No. 3, withdrew from the tournament before it started. It was fitting because Sharapova no longer figures in the conversation as to who is No. 1.
Meanwhile, Flavia Pennetta, who had dropped out of the Top 50, reemerged to pull off a string of upsets.
Li Na re-stablished herself as a contender in Grand Slams.
The Grand Slams are over. The biggest prize left is the WTA Championships. Williams and Azarenka have locked up spots. Everyone else is in hot pursuit.
The latest WTA rankings are out and so are the post-U.S. Open power rankings.