Serena Williams and Novak Djokovic head the direct entry lists for this year's U.S. Open.

Williams will aim to break the record she currently shares with Steffi Graf for most Grand Slam titles in the Open era, while Djokovic will seek to reach his sixth final in the past seven years at Flushing Meadows.

The fields announced by the U.S. Tennis Association on Wednesday include the top 98 members of this week's ATP rankings, and 101 of the top 103 in the WTA rankings. The two women missing: 2006 U.S. Open champion Maria Sharapova, who is serving a doping ban that she is appealing, and two-time runner-up Victoria Azarenka, who recently announced she is pregnant.

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