Series receive bonus prize money, depending on where they finished in the 2015 US Open, according to money schedule below. Singles players 2015 US Open – Men's singles 2015 US Open – Women's singles Day-by-day summaries Before the tournament Maria Sharapova, the 2006 champion, ranked third in the world (formerly first), withdrew from the tournament due to a leg injury the day before tournament began. Making her withdrawal that was for the second time in three years. Day 4 British qualifier Johanna Konta upset the 9th seeded Garbiñe Muguruza won in three sets at 7–6(7–4), 6–7(4–7), 6–2 on an epic longest match at three hours and twenty-three minutes, surpassing Nadia Petrova–Samantha Stosur match in the 2011 US Open. Day 6 Eugenie Bouchard announced that she is withdrawing from the tournament citing a concussion days before her scheduled fourth round match with 43rd-ranked Roberta Vinci. She also withdrew from Women's Doubles and Mixed Doubles. Due to a withdrawal issue, Vinci advanced to her US Open quarterfinal in four years. Day 8 Kevin Anderson, the 15th seed, upset the 3rd seeded Andy Murray in the fourth round on a four setter win. This was the first time since 2010 US Open that Murray failed to reach his Slam quarterfinal. Anderson became the first South African to reach a Slam quarterfinal since Wayne Ferreira at the 2003 Australian Open. Day 9 and 10 In the women's quarterfinals, Kristina Mladenovic, Petra Kvitová and Simona Halep reached in their first US Open quarterfinal. For Mladenovic, it was her first Grand Slam singles quarterfinal overall six years after her first Slam debut. Day 11 The women's semifinals was scheduled to be on September 10 but was cancelled due to a rain. Day 12 Roberta Vinci defeated Women's No. 1 and 3-time defending champion Serena Williams in three sets. This loss ended Williams' bid to win a calendar-year Grand Slam. Day 13 In the women's final, the two players were Italian: Vinci and Flavia Pennetta. This was the first time this happened in the Open Era. Events Men's singles Novak Djokovic def. Roger Federer, 6–4, 5–7, 6–4, 6–4 Women's singles Flavia Pennetta def. Roberta Vinci, 7–6(7–4), 6–2 Men's doubles Pierre-Hugues Herbert / Nicolas Mahut def. Jamie Murray / John Peers, 6–4, 6–4 Women's doubles Martina Hingis / Sania Mirza def. Casey Dellacqua / Yaroslava Shvedova, 6–3, 6–3 Mixed doubles Martina Hingis / Leander Paes def. Bethanie Mattek-Sands