US Open pictures

CHAMPION: US Open winner Juan Martin del Potro.

GOOD SPORTS: Juan Martin del Potro after preventing Roger Federer from winning his sixth straight US Open.

CELEBRATION: Juan Martin del Potro after beating Roger Federer.

BRILLIANCE: Juan Martin del Potro after winning the US Open.

IMPACT: Juan Martin del Potro has his eye on the ball.

DOUBLE: Juan Martin del Potro in the US Open final.

TOUGH TIME: Juan Martin del Potro in the US Open final.

BREAK: Juan Martin del Potro takes a breather in the US Open final against Roger Federer.

LOOKING SKYWARD: Juan Martin del Potro serves to Roger Federer in the US Open final.

GRACEFUL: Roger Federer in the US open final against Juan Martin del Potro.

SLAM: Roger Federer in the US Open final.

GOT IT: Roger Federer returns in the US Open final.

REACHING OUT: Roger Federer reaches across the court.

RETURNING: Roger Federer returns to Juan Martin del Potro in the US Open final.

LOOK WHAT MUM DID: US Open champion Kim Clijsters with daughter Jada.

SEXY: Actress Kim Cattrall watches Roger Federer of Switzerland play Simon Greul of Germany.

REACHING OUT: Caroline Wozniacki takes it in her stride against Kim Clijsters.

IN VOGUE: Anna Wintour, Editor-in-chief of American Vogue, watches from the crowd as Roger Federer of Switzerland plays Simon Greul of Germany.

PRESSURE: Caroline Wozniacki reacts to her play against Kim Clijsters.

ANCHORMAN: Actor Will Ferrell and his wife Viveca Paulin watch Rafael Nadal of Spain and Nicolas Kiefer of Germany.

DEVELOPING: Actor Jason Bateman kisses his wife Amanda Anka while watching Vera Zvonareva of Russia and Flavia Pennetta of Italy.

DOUBLE ACT: Comedian Will Ferrell (left) and tennis star James Blake react as Ferrell appears dressed as Blake at centre court for the Arthur Ashe Kids Day program prior to the first round of the US Open at the National Tennis Center in New York.

OLD SCHOOL: Former New York Mayor David Dinkins and former tennis great Billie Jean King.

RETURNING: Caroline Wozniacki returns a Kim Clijsters hit.

SERVING IT UP: Tennis stars Andy Roddick, Maria Sharapova, Serena Williams and Roger Federer watch comedian Will Ferrell (front) in a forehand shot contest as they appear at centre court for the Arthur Ashe Kids Day program prior to the first round of the US Open at the National Tennis Center in New York.

DOUBLE: Caroline Wozniacki serves to Kim Clijsters.

FIRE POWER: Caroline Wozniacki hits a return to Kim Clijsters.

RUSSIAN KILLER: Melanie Oudin celebrates her win over Nadia Petrova at the US Open, her fourth straight win against a Russian opponent.

CROONING: Singer Tony Bennett waves to the crowd as he arrives to watch Rafael Nadal of Spain play Gael Monfils of France.

WORKOUT: Caroline Wozniacki wipes her face with a towel during her match against Kim Clijsters.

YOUNG LOVE: US Open upstart Melanie Oudin with boyfriend Austin Smith following a practice session.

FANS: Actor Dominic Cooper and Amanda Seyfried sit in the crowd as they watch Andy Roddick of the United States play Marc Gicquel of France.

40-LOVE: Actress Nicole Kidman and Musician Keith Urban kiss during a match between Federer and Robredo at the US Open tennis championship in New York.

ENTOURAGE: Actor Jeremy Piven poses for a picture with female fans as he attends the night session at the US Open.

PACKED HOUSE: Melanie Oudin serves to former world number one Maria Sharapova in front of a packed Arthur Ashe Stadium crowd during their third round match at the US Open.

WALKING ON THE COMMON: Rap artist Common walks on the court as Serena Williams of the US has a practice session at the US Open.

OUT OF THE SHADOWS: From unknown to the US Open quarterfinals, Melanie Oudin has become the darling of Flushing Meadows.

MUMMY DEAREST: New Mum Kim Clijsters, who will face Serena Williams in the US Open semis, has reinvigorated her career after a two-year break.

SPOTTED: Golfer Greg Norman and actor Jack Nicholson.

US OPEN CHAMPION: Kim Clijsters sends down a serve against Caroline Wozniacki.

TOO MUCH: Kim Clijsters reacts to her US Open triumph.

ON SERVE: Melanie Oudin has served just four aces in four matches at the US Open.

SUPER MUM: US Open champion Kim Clijsters with her daughter Jada.

FINAL TWO: US Open Kim Clijsters and runner-up Caroline Wozniacki.

FAN FAVOURITE: Melanie Oudin signs autographs following her training session ahead of the quarterfinals of the US Open.

WASHED OUT: Rafael Nadal (right) and Fernando Gonzalez had their quarterfinal halted by rain at the US Open.

SING STAR: Gwen Stefani.

SIGNED, SERVED AND DELIVERED: Singer Justin Timberlake signs his autograph.

FACES IN THE CROWD: Stuart Townsend, Charlize Theron, middle, and Anna Wintour, Editor-in-Chief of American Vogue, watch the men's singles semi-finals.

RELEASE: Kim Clijsters falls to the court after defeating Caroline Caroline Wozniacki to win the US Open.

WINNER ON THE DAY: Caroline Wozniacki, right, congratulates Kim Clijsters on her US Open triumph.