The 2011 US Open was a tennis tournament played on the outdoor hard courts at the Billie Jean King National Tennis Center in Flushing Meadows Park, of Queens, New York City, United States. It began on August 29 and was originally scheduled to end on September 11, but the men's final was postponed to September 12 due to rain.

Rafael Nadal and Kim Clijsters were the defending champions. Due to an abdominal muscle injury, Clijsters opted not to defend her title.

In the women's singles, Australia's Samantha Stosur defeated Serena Williams in straight sets 6–2, 6–3 for her first Grand Slam title. Stosur thus became the first Australian female player to win a Grand Slam since Evonne Goolagong Cawley in 1980.

In the men's singles, both Nadal and Novak Djokovic played the final for the second consecutive year. This time, Djokovic won 6–2, 6–4, 6–7(3–7), 6–1 for his first US Open title.

Points and prize money

Point distribution Below is a series of tables for each of the competitions showing the ranking points on offer for each event.

Seniors points StageMen's singlesMen's doublesWomen's singlesWomen's doublesChampion2000Runner up12001400Semifinals720900Quarterfinals360500Round of 16180280Round of 3290160Round of 644501005Round of 12810–5–Qualifier2560Qualifying 3rd round1650Qualifying 2nd round840Qualifying 1st round02

Junior points StageBoys singlesBoys doublesGirls singlesGirls doublesChampion250180250180Runner up180120180120Semifinals1208012080Quarterfinals80508050Round of 1650305030Round of 3230–30–Qualifier who loses in first round2525Qualifying final round2020

Wheelchair points StageMen's singlesWomen's singlesQuad singlesMen's doublesWomen's singlesQuad doublesChampion800Runner up500100Semifinals/3rd375100–Quarterfinals/4th100–

Prize money The USTA announced that the 2011 US Open purse has increased by more than one million dollars to reach a record $23.7 million. In addition to the base purse of $23.7 million, the top three men's and top three women's finishers in the Olympus US Open Series may earn up to an additional $2.6 million in bonus prize money at the US Open, providing a potential total payout of $26.3 million. Both the men's and women's US Open singles champions will earn a record $1.8 million with the ability to earn an additional $1 million in bonus prize money (for a total $2.8 million potential payout) based on their performances in the Olympus US Open Series. Below is the list of prize money given to each player in the main draw of the professional competitions; all prize money is in U.S. dollars (US$); doubles prize money is distributed per pair. 2011 US Open finishMen's and women's singlesMen's and women's doublesMixed doublesChampion$1,800,000$420,000$150,000Finalist$900,000$210,000$70,000Semifinalist$450,000$105,000$30,000Quarterfinalist$225,000$50,000$15,000Round of 16$110,000$25,000$10,000Round of 32$55,000$15,000$5,000Round of 64$31,000$10,000–Round of 128$19,000–Qualifying competition$8,0002nd round qualifying$5,6251st round qualifying$3,000

Bonus prize money

2011 US Open finish2011 Olympus US Open series finish1st place2nd place3rd placeChampion$1,000,000$500,000$250,000Finalist$500,000$250,000$125,000Semifinalist$250,000$125,000$62,500Quarterfinalist$125,000$62,500$31,250Round of 16$70,000$35,000$17,500Round of 32$40,000$20,000$10,000Round of 64$25,000$12,500$6,250Round of 128$15,000$7,500$3,750Awardees Mardy Fish $70,000 Novak Djokovic $500,000 John Isner $31,250 Serena Williams $500,000 $12,500 Maria Sharapova $10,000

Singles players

Men's singles Champion Runner-up Novak Djokovic Rafael Nadal Semifinals out Roger Federer Andy Murray Quarterfinals out Janko Tipsarević Jo-Wilfried Tsonga John Isner Andy Roddick 4th round out Alexandr Dolgopolov Juan Carlos Ferrero Mardy Fish Juan Mónaco Gilles Simon Donald Young (WC) David Ferrer Gilles Müller 3rd round out Nikolay Davydenko Ivo Karlović (PR) Tomáš Berdych Marcel Granollers Marin Čilić Tommy Haas (PR) Fernando Verdasco Kevin Anderson Alex Bogomolov Jr. Juan Martín del Potro Juan Ignacio Chela Feliciano López Florian Mayer Julien Benneteau (WC) Igor Kunitsyn David Nalbandian 2nd round out Carlos Berlocq Potito Starace Flavio Cipolla Richard Gasquet Fabio Fognini Philipp Petzschner Mikhail Kukushkin Gaël Monfils Dudi Sela Bernard Tomic Radek Štěpánek Alejandro Falla Sergei Bubka (Q) Marsel İlhan (Q) Michaël Llodra Malek Jaziri (Q) Rogério Dutra Da Silva (LL) Robby Ginepri (WC) Diego Junqueira Guillermo García López Stanislas Wawrinka Steve Darcis Vasek Pospisil (Q) Robin Haase James Blake Jean-René Lisnard (Q) Jack Sock (WC) Denis Istomin Ernests Gulbis Jürgen Melzer Ivan Ljubičić Nicolas Mahut 1st round out Conor Niland (Q) Pere Riba Michael Berrer Ivan Dodig Frederico Gil Kei Nishikori Fernando González (PR) Sergiy Stakhovsky Romain Jouan (Q) Horacio Zeballos Albert Ramos Augustin Gensse (Q) Xavier Malisse Albert Montañés Pablo Andújar Grigor Dimitrov Santiago Giraldo Thomaz Bellucci Michael Yani (Q) Ryan Harrison (WC) Philipp Kohlschreiber Andreas Seppi Jonathan Dasnières de Veigy (Q) Viktor Troicki Lu Yen-hsun Andreas Haider-Maurer Frank Dancevic (Q) Jarkko Nieminen Victor Hănescu Go Soeda (Q) Thiemo de Bakker Tobias Kamke Louk Sorensen (Q) Steve Johnson (WC) João Souza (Q) Marcos Baghdatis Filippo Volandri Karol Beck Daniel Gimeno Traver Ricardo Mello Máximo González Lukáš Lacko (LL) Dmitry Tursunov Marinko Matosevic (WC) Tatsuma Ito Lukáš Rosol Rui Machado Somdev Devvarman Igor Andreev Jesse Huta Galung (Q) Olivier Rochus Adrian Mannarino Michael Russell Marc Gicquel Ryan Sweeting Nicolás Almagro Mikhail Youzhny Édouard Roger-Vasselin Matthias Bachinger Éric Prodon Blaž Kavčič Bobby Reynolds (WC) Robert Farah (Q) Andrey Golubev

Women's singles Champion Runner-up Samantha Stosur Serena Williams /(PR) Semifinals out Caroline Wozniacki Angelique Kerber Quarterfinals out Andrea Petkovic Anastasia Pavlyuchenkova Flavia Pennetta Vera Zvonareva 4th round out Svetlana Kuznetsova Carla Suárez Navarro Ana Ivanovic Francesca Schiavone Monica Niculescu Peng Shuai Maria Kirilenko Sabine Lisicki 3rd round out Vania King Akgul Amanmuradova Roberta Vinci Sílvia Soler Espinosa (Q) Victoria Azarenka Sloane Stephens (WC) Jelena Janković Chanelle Scheepers Lucie Šafářová Alla Kudryavtseva Julia Görges Maria Sharapova Christina McHale Nadia Petrova Irina Falconi Anabel Medina Garrigues 2nd round out Arantxa Rus Jarmila Gajdošová Pauline Parmentier Elena Baltacha Zheng Jie Alizé Cornet Kaia Kanepi Simona Halep Gisela Dulko Michaëlla Krajicek (Q) Shahar Pe'er Petra Cetkovská Jelena Dokić Petra Martić Mona Barthel Mirjana Lučić Alexandra Dulgheru Madison Keys (WC) Yanina Wickmayer Agnieszka Radwańska Tsvetana Pironkova Laura Pous Tió Romina Oprandi (Q) Anastasiya Yakimova Marion Bartoli Vera Dushevina Polona Hercog CoCo Vandeweghe Dominika Cibulková Venus Williams Laura Robson (Q) Kateryna Bondarenko 1st round out Nuria Llagostera Vives Elena Vesnina Gréta Arn Iveta Benešová Daniela Hantuchová Tamira Paszek Jamie Hampton (WC) Sara Errani Ekaterina Bychkova (Q) Vitalia Diatchenko (Q) Casey Dellacqua (WC) Irina-Camelia Begu Tamarine Tanasugarn Kimiko Date-Krumm Mathilde Johansson Li Na Johanna Larsson Rebecca Marino Eleni Daniilidou Bojana Jovanovski Sania Mirza Réka-Luca Jani Evgeniya Rodina Ksenia Pervak Alison Riske (WC) Olga Govortsova Barbora Záhlavová-Strýcová Anna Tatishvili María José Martínez Sánchez Anne Keothavong Marina Erakovic (Q) Galina Voskoboeva (Q) Petra Kvitová Patricia Mayr-Achleitner Jill Craybas (WC) Magdaléna Rybáriková Sorana Cîrstea Anastasia Rodionova Lauren Davis (WC) Urszula Radwańska (Q) Varvara Lepchenko Virginie Razzano Misaki Doi Kristina Barrois Aravane Rezaï (WC) Melanie Oudin Noppawan Lertcheewakarn (Q) Heather Watson Alexandra Panova (Q) Aleksandra Wozniak (Q) Anastasija Sevastova Ekaterina Makarova Yung-jan Chan (Q) Bethanie Mattek-Sands Alberta Brianti Sofia Arvidsson Zhang Shuai Klára Zakopalová Vesna Dolonts Alona Bondarenko (PR) Karin Knapp (Q) Ayumi Morita Lucie Hradecká Stéphanie Foretz Gacon (Q)

Player(s) of the day Day 1: Madison Keys – The 16-year-old Keys defeated her compatriot and elder by 21 years, Jill Craybas on the Grandstand with a 6–2, 6–4 score in their first-round encounter, giving the Florida native her first-ever win at the US Open. Day 2: Simona Halep – Halep, the 19-year-old world number 53, defeated the reigning French Open champion and sixth seed Li Na at Louis Armstrong Stadium with a 6–2, 7–5 score in their first round encounter. Day 3: Julien Benneteau – The French wild-card upset tenth-seeded Spaniard Nicolás Almagro in straight sets. Day 4: Juan Carlos Ferrero – The unseeded Ferrero, an experienced ATP Tour player and the second oldest man in the draw at 31 years old, defeated seventh-seeded Gaël Monfils in an extraordinary five-set match to advance into the third round. Day 5: Flavia Pennetta – The twenty-sixth seed, two-time quarterfinalist, and former world number 10 upset third seed, 2006 US Open champion, and former world number 1 Maria Sharapova in three sets, 6–3, 3–6, 6–4, to advance to the fourth round. Day 6: Francesca Schiavone – The 31-year-old seventh seed saved a match point in her battle against world number 81 Chanelle Scheepers, and went on to win, 5–7, 7–6, 6–3, advancing to the fourth round. Day 7: Donald Young – The 22-year-old American wildcard upset twenty-fourth seeded veteran Juan Ignacio Chela in the third round in straight sets with a score of 7–5, 6–4, 6–3. He made it to the fourth round of a Grand Slam for the first time in his career after upsetting Chela and the fourteenth seeded Stanislas Wawrinka in the second round. Day 8: Anastasia Pavlyuchenkova – The seventeenth-seeded Russian reached her second quarterfinal this year after upsetting seventh seed Francesca Schiavone in three tight sets, 5–7, 6–3, 6–4. Day 9: No matches completed due to rain. Day 10: No matches completed due to rain. Day 11: John Isner – The twenty-eighth seeded American upset twelfth-seeded Frenchman Gilles Simon, 7–6, 3–6, 7–6, 7–6, to reach his first ever Grand Slam quarterfinal. Day 12: Rafael Nadal – The number two seed reached his fourth consecutive US Open semifinal after defeating American Andy Roddick in straight sets, 6–2, 6–1, 6–3, in under two hours. Day 13: Samantha Stosur – The number nine seed became the first Australian woman since Wendy Turnbull in 1977 to reach a US Open final, after defeating unseeded German Angelique Kerber in three sets in her semifinal match, 6–3, 2–6, 6–2. Day 14: Samantha Stosur – The Australian player upset the American US Open three-time champion Serena Williams in straight sets, 6–2, 6–3, winning her first Major. Day 15: Novak Djokovic – The Serbian player continued his amazing season by winning his first US Open and his third Grand Slam of the year, defeating the defending champion Rafael Nadal for the sixth time in 2011.

Day-by-day summaries

Events

Seniors

Men's singles

Novak Djokovic defeated Rafael Nadal, 6–2, 6–4, 6–7(3–7), 6–1 It was Djokovic's 10th title of the year and 28th of his career. It was his 3rd Grand Slam title of the year and 4th of his career. It was his first U.S. Open title.

Women's singles

Samantha Stosur defeated Serena Williams, 6–2, 6–3 It was Stosur's 1st title of the year and 3rd of her career. It was her first (and only) Grand Slam title.

Men's doubles

Jürgen Melzer / Philipp Petzschner defeated Mariusz Fyrstenberg / Marcin Matkowski, 6–2, 6–2

Women's doubles

Liezel Huber / Lisa Raymond defeated Vania King / Yaroslava Shvedova, 4–6, 7–6(7–5), 7–6(7–3) Huber and Raymond won their first US Open title as a doubles pair.

Mixed doubles

Melanie Oudin / Jack Sock defeated Gisela Dulko / Eduardo Schwank, 7–6(7–4), 4–6, [10–8] Oudin and Sock became the 12th unseeded team to win a title in the history of the US Open.

Juniors

Boys' singles

Oliver Golding defeated Jiří Veselý, 5–7, 6–3, 6–4

Girls' singles