French fifth seed Jo-Wilfried Tsonga became the first major casualty of the US Open on Thursday while women's second seed Agnieszka Radwanska teetered on the brink before staging a dramatic comeback.

Former world number one Andy Roddick will retire after this year's US Open, the American star announced on Thursday, the day of his 30th birthday.

Roddick won the US Open in 2003 but never managed to

Top seed and five-time champion Roger Federer reached the US Open third round on Thursday with an easy 6-2, 6-3, 6-2 win over Germany's Bjorn Phau.

World number one Federer will tackle Spain's Fernan

British teen Laura Robson ended the singles career of three-time US Open champion Kim Clijsters on Wednesday with an emotional 7-6 (7/4), 7-6 (7/5) victory in the second round of the US Open.

Clijste

Britain's Andy Murray backed compatriot Laura Robson to reach the top of the sport after the teenager's stunning US Open victory over three-time champion Kim Clijsters.

Robson, 18, the youngest playe

Sania Mirza entered the mixed doubles second round with a new partner, but the Mahesh Bhupahti-Rohan Bopanna combo made a shock first-round exit from the men's doubles event of the US Open here.

Sani

World No. 1 Victoria Azarenka and Spanish fourth seed David Ferrer advanced at the US Open with straight-set victories on Wednesday at the season's final Grand Slam event.

Azarenka reached the third

Former winners Andy Roddick and Venus Williams moved into the US Open second round on Tuesday as defending champion Novak Djokovic and women's favorite Serena Williams prepared to make their bow.

Rod

Defending champion Novak Djokovic advanced to the second round of the US Open on Tuesday with a 6-1, 6-0, 6-1 victory over Italy's Paolo Lorenzi.

Serbian second seed Djokovic was broken in the first

Third-seeded Maria Sharapova reached the US Open second round on Monday with a 6-2, 6-2 win over Hungary's Melinda Czink.

Sharapova, the 2006 champion, will face Spain's Lourdes Dominguez Lino for a