CiCi Bellis, the junior world number two, was given a wild card for the final Grand Slam of the year after winning the US girls' national championships.

Ranked 1,208 in the world, she shocked the Australian Open finalist from Slovakia in a 6-1, 4-6, 6-4 win.

With her first round victory, Bellis has become the youngest winner of a US Open match since Russian Anna Kournikova in 1996.

Kournikova was 59 days younger when she made it into the fourth round at Flushing Meadows.

Bellis, who is 15 years and 152 days old, is the youngest player to feature in the main draw of a Grand Slam for nine years.

She had never played at Women's Tennis Association level until today.

"I'm feeling amazing," she said afterwards.

"I'm still speechless.

I'm still in shock about that match.

"I went into the match thinking it was going to be such a great experience, but I never thought I would come out on top winning."

Bellis will face world number 48 Zarbia Dyas of Kazakhstan, but will not be able to collect her prize money as she in an amateur.

Serena Williams is chasing her sixth US Open title ©AFP/Getty Images



Elsewhere in the women's draw, American Serena Williams took just 55 minutes to put away her opening round opponent, fellow countrywoman Taylor Townsend, 6-3, 6-1.

Wimbledon champion Petra Kviotva is also safely through to the second round, dropping just a single game.

The Czech beat Kristina Mladenovic of France 6-1, 6-0.

Beaten Wimbledon finalist and rising tennis star Eugenie Bouchard of Canada, seeded seventh at the US Open, beat Olga Govortsova of Belarus 6-2, 6-1.

Serbian Ana Ivanovic got the better of American Alison Riske with a 6-3, 6-0 win.

On the men's side, five-time US Open champion Roger Federer had a straightforward start to his campaign.

The Swiss, who is seeded second and fancied by many to win his 18th Grand Slam on the courts of Flushing Meadows, beat Australian world number 76 Marinko Matosevic 6-3, 6-4, 7-6.

David Ferrer beat Damir Dzumhur (pictured) in four sets ©Getty Images



David Ferrer, seeded fourth, dropped a set on his way to victory.

The Spaniard beat Damir Dzumhur of Bosnia and Herzegovina 6-1, 6-2, 2-6, 6-2.

In a clash of the Americans, John Isner needed two tiebreaks to dispatch Marcos Giron, winning 7-6, 6-2, 7-6.

Action will continue tomorrow with 2006 US Open champion Maria Sharapova of Russia and Swiss Stan Wawrinka among those in second round action.