Pippa Middleton watches Victoria Azarenka take on Samantha Stosur at the U.S. Open in New York

Pippa Middleton watches Victoria Azarenka of Belarus take on Samantha Stosur, Australia, during their quarterfinal match at the 2012 U.S. Open held at the National Tennis Center on September 4, 2012. UPI Photo/Monika Graff