Caroline Wozniacki, who has failed to win her opening matches at the past two tournaments in Toronto and Cincinnati, was retained as the No1 seed at the US Open on Tuesday.
The Danish world No1, without a major to her name but with the public support of Rory McIlroy, is ranked in front of Vera Zvonareva, who reached the final of both the US Open and Wimbledon last year, the 2006 US Open champion Maria Sharapova and Victoria Azarenka of Belarus. The three-time US Open champion Serena Williams is seeded No28.
Williams returns to New York for the first time since her infamous bust-up with a line judge at the end of her loss to Kim Clijsters. Out for nearly a year, she won the first tournament of her comeback in Toronto two weeks ago but hobbled out of Cincinnati last week with a sore toe, the legacy, she said, of the restaurant accident in Germany that followed Wimbledon in 2010.
"After careful deliberation regarding Serena Williams's seeding, we decided to maintain the objective criteria in place to determine the women's singles seeds," the tournament director, Jim Curley, said.
The Wimbledon champion Petra Kvitova is seeded No5, ahead of the French Open champion Li Na, last year's French Open champion Francesca Schiavone and Marion Bartoli of France.
The singles draws for men and women will be made on Thursday at 5pm UK time.
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