Pippa Middleton attends US Open

Arthur Ashe Stadium
© PA Photos
Pippa Middleton attends the US Open as a guest of world number one Roger Federer.

The sister of the Duchess of Cambridge has been in attendance at the US Open this evening.

Pippa Middleton, wearing a colour-blocked, open-collared sheath dress, had an accreditation that stated she was at the Arthur Ashe Stadium in New York as a guest of men's world number one Roger Federer.

Reports have also suggested that she was accompanied by Spencer Vegosen, a tennis player who is a graduate of Harvard University.

Middleton, 28, had been watching Victoria Azarenka's three-set victory over defending champion Samantha Stosur before rain stopped play at Flushing Meadows.

You can follow all the action from the US Open with Sports Mole's live commentary here.

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