Maria Sharapova(Russia) the 3rd Seeded out of 2013 US Open with shoulder injury Wednesday Aug 21,2013

''Maria Sharapova has informed us that she will be unable to compete at the US Open this year due to a right shoulder bursitis and has withdrawn from the tournament," tournament director David Brewer said in a statement.

Third-seeded Russian Maria Sharapova has pulled out of next week's US Open due to a shoulder injury, tournament organisers said on Wednesday Aug 21,2013

Note
Defending champion Serena Williams is the top seed for the US Open at Flushing Meadows in New York, ahead of Belarussia's Victoria Azarenka and Poland's Agnieszka Radwanska, who now moves up to third.