Pippa Middleton scores a style ace at U.S. Open as guest of Roger Federer

Tennis fan Pippa Middleton scores a style ace at U.S. Open as guest of Roger Federer
The Duchess of Cambridge's sister, 28, wore a neon, colour-block dressShe sat next to Harvard graduate and accomplished tennis player Spencer Vegosen to watch the women's singles quarterfinalsMr Vegosen's father is the president of the U.S. Tennis Association

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UPDATED:

22:08 GMT, 4 September 2012

Tennis fan Pippa Middleton was spotted in New York today as she attended day nine of the U.S. Open as a guest of Roger Federer.

Wearing a figure-flattering colour block dress, accessorised with tan wedges and a straw Kate Spade handbag, the 28-year-old stopped to pose for photographers before entering the venue at Flushing Meadows, Queens.

Once inside the courts she promptly took a seat next to dark-haired, 6ft 3ins Spencer Vegosen – a Harvard graduate and accomplished tennis player – before watching the women's singles quarterfinals game unfold.

Pippa Middleton at the US Open in New York City

PIPPA MIDDLETON

Pippa opted for a colourful dress, accessorised with tan wedges as she attended The Open today

VIP treatment: Pippa was a guest of Roger Federer's at the U.S. Open

VIP treatment: Pippa was a guest of Roger Federer's at the U.S. Open

Mr Vegosen, who now resides in New York but is originally from Illinois, Chicago is a familiar face on the sporting scene and he was once one of the top junior tennis players in the U.S, winning 11 sportsmanship awards. His father Jon is also president of the U.S.Tennis Association.

It is believed Mr Vegosen received a BA in East Asian studies and mathematics from Harvard University and spent last summer working in Hong Kong as an analyst for Goldman Sachs. However it is not known where he currently works.

Since landing in the metropolis on Saturday to attend meetings about her upcoming book, Celebrate: A Year of Festivities for Families and Friends, Pippa has been snapped with a number of men while sampling some of New York's finer delights.

In an opulent welcome hotelier Andre Balazs, who is reportedly worth more than $450 million, flew her by seaplane – a trip that costs $525 for a single journey – to his resort, Sunset Beach, on Shelter Island on Sunday.

And later that evening the New York Daily News reported that she was spotted at the Electric Room at Dream Downtown in the Meatpacking district
with former New York Ranger Sean Avery.

Pippa took a seat next to Spencer Vegosen as she attended the women's singles quarterfinals

Pippa took a seat next to Spencer Vegosen as she attended the women's singles quarterfinals

In the moment: Pippa is a fan of tennis and earlier this year she attended Wimbledon with her family

In the moment: Pippa is a fan of tennis and earlier this year she attended Wimbledon with her family

Pippa Middleton

Pippa Middleton

Sporting style: Pippa opted for some vintage sunglasses as she watched Samantha Stosur of Australia play Victoria Azarenka of Belarus during the quarterfinals match

'She was only there for a short time,' a source told the paper, adding they were there with Mazdack Rassi, owner of photography company Milk Studios.

It has been suggested that Pippa is staying at the Carlyle Hotel located in the Upper East Side, where Roger Federer also has a suite, with two friends, where rooms start at $600 and reach $15,000 – without taxes.

Her trip, during which she is apparently courting the perks of fame, come despite her demands to remain out of the public gaze.

While newspapers have respected her
request to be recognised as a private citizen, she still very much seems
to be enjoying the high-flying life of a socialite.

Pippa was seen wearing a special 'Player Guest' pass at The US Open match

Pippa Middleton at the US Open in New York City

Fashion pack: It is believed Pippa might make an appearance at New York Fashion
Week

Despite her request, U.S. news sites chose to publish photographs of her
playing table tennis with Balazs over the weekend, but MailOnline has respected her
wishes.

Pippa, who turns 29 on Thursday, is in town for meetings over her new book, which is out on October
30. She will not be holding an publicity events for the book while she
is here, Viking publishers said.

Billed as a 'comprehensive seasonal guide to simple and creative
entertaining', it is a book she hopes will cement her credentials as a
party planner, and industry observers believe it could net her a small
fortune in the process.

It is believed that Pippa is set to make an appearance at New York's Fashion
Week, which kicks off on September 6.