Originally, it was scheduled to end with the men's singles final match on Sunday, September 13, but due to rain the tournament was extended by one day.

In the men's singles final, five-time defending champion Roger Federer lost to Argentina's Juan Martín del Potro in a match lasting over four hours.

American Idol winner Jordin Sparks performed her hit single "Battlefield", along with rising stars Honor Society and Justin Bieber.

There were also tennis matches and contests featuring Serena Williams, Ana Ivanovic Andy Roddick, Roger Federer, Maria Sharapova, Kim Clijsters, and James Blake.

[2] The first day of the tournaments saw many seeds get through pretty easily in straight sets: Roger Federer, James Blake, Lleyton Hewitt, Nikolay Davydenko and Radek Štěpánek.

The day also produced a couple of upsets, when Mikhail Youzhny continued 26th seeded Paul-Henri Mathieu's horrible US Open record by beating him in four.

The exciting day continued with a couple of five-set marathons, with Simon Greul defeating Giovanni Lapentti, Guillermo García López out-lasting Peter Polansky, and Jan Hernych surviving against Rainer Schüttler.

Joining her were defending 2009 Wimbledon and Australian Open champion Serena Williams, Amélie Mauresmo, Victoria Azarenka, Flavia Pennetta, Elena Vesnina, Agnieszka Radwańska, Li Na and Marion Bartoli who all won in two sets.

Australian Samantha Stosur was pushed by veteran player Ai Sugiyama in three sets, Daniela Hantuchová got past American Meghann Shaughnessy in three as well.

In the second round, her sister Alona Bondarenko, 2009 French Open champion Svetlana Kuznetsova, Maria Sharapova, Elena Dementieva, Nadia Petrova and Tathiana Garbin all advanced.

[22] On the women's side, upsets continued with Amélie Mauresmo falling to Aleksandra Wozniak, Anabel Medina Garrigues losing to Kirsten Flipkens, and dark horse favorite Australian Samantha Stosur losing to American Vania King,[23] all in straight sets, while Marion Bartoli and Agnieszka Radwańska both fell to resurging players Kim Clijsters and Maria Kirilenko in three.

However, the day also saw half of the seeds getting through easily and was led by former champion Venus Williams and Flavia Pennetta, who won in double bagel, Victoria Azarenka, Francesca Schiavone, Elena Vesnina, and Li Na.

The day ended for the first time in over 30 years in the US Open history by a women's match, which saw Serena Williams dispatching Melinda Czink in just 53 minutes.

[24] On the doubles side, there were a couple of major upsets: sixth seeded Mariusz Fyrstenberg and Marcin Matkowski, fell in their opening round, as well as unseeded world no.

The women's side received a lot of buzz, with 17-year-old American Melanie Oudin upsetting hot favorite and US Open Series champion Elena Dementieva in the second round.

Unseeded players who got through in straight sets were Kateryna Bondarenko, who eliminated Ivanovic, Shahar Pe'er, Sara Errani, and Petra Kvitová.

She was joined by Daniela Hantuchová, who crushed American Vania King, Li Na, Kim Clijsters, Flavia Pennetta, and Venus Williams.

On the women's side, seventh seeded Hsieh Su-wei and Peng Shuai were ousted by the American team of Alexa Glatch and Carly Gullickson.

Ukrainian Kateryna Bondarenko bested Australian qualifier Anastasia Rodionova in the third round 7-6(7–4), 6–4, which allowed her to meet Argentine Gisela Dulko, who beat Kazakhstan's Yaroslava Shvedova 6–3, 6–4.

Swede Robin Söderling advanced to the quarterfinals with a retirement of Russian Nikolay Davydenko to face the Swiss Roger Federer, who beat Spaniard Tommy Robredo in straight sets.

The first match featured Ukrainian Kateryna Bondarenko making quick work of Argentine Gisela Dulko in double-bagel sets in 47 minutes.

Caroline Wozniacki defeated Svetlana Kuznetsova 2–6, 7–6, 7–6 in an absorbing contest that kicked off Monday's night session on Arthur Ashe Stadium.

The next match featured American Serena Williams who defeated a gritty competitor in Italian Flavia Pennetta in the quarterfinals in two hard-fought sets.

Argentinie Juan Martín del Potro defeated Croatian Marin Čilić in four sets and became the third of his country to qualify for the semifinals (after Vilas and Nalbandian).

The mixed doubles final saw Americans Carly Gullickson and Travis Parrott claim the title in straight sets over Zimbabwe's Cara Black and Indian Leander Paes.

Schedule of play Rafael Nadal needed 34 minutes to finish off Fernando González in their rain-interrupted quarterfinal, advancing 7–6, 7–6, 6–0 at the Arthur Ashe Stadium.

[43] After securing her thirteenth straight win at the US Open, Clijsters went on to play Danish youngster Caroline Wozniacki in the final, who beat her unseeded opponent Yanina Wickmayer 6–3 6–3.

[44] Seeded players out Schedule of play In the first match, Juan Martín del Potro defeated third-ranked Rafael Nadal easily, winning 6–2, 6–2, 6-2 and became the first finalist of the men's singles tournament.

Del Potro's convincing victory, which echoed Caroline Wozniacki's takedown of crowd favorite Melanie Oudin in the quarterfinals, set the twenty-year-old Argentine up for his first Grand Slam final.

Seeded players out Schedule of play The Williams sisters beat Cara Black and Liezel Huber in straight sets to win the women's doubles championship, 6-2 6–2.