Women's Open in Cincinnati. In the second round, she lost to Kim Clijsters. Due to her inability to defend her points from 2009, she dropped from world No. 35 to No. 70. At the Rogers Cup she scored wins over world No. 36 Andrea Petkovic and No. 21 Nadia Petrova to reach the third round, where she lost to sixth seed Francesca Schiavone. Safina defeated Schiavone in the first round of the Pilot Pen Tennis in New Haven, but lost to Maria Kirilenko in the quarterfinals. At the US Open, Safina was eliminated in the first round by Daniela Hantuchová. Safina accepted a wild card from the Hansol Korea Open, where she defeated qualifier Simona Halep in the first round. She also won against Maria Kirilenko in straight sets. She lost to Klára Zakopalová in the quarterfinals. Safina was unseeded coming into the Pan Pacific Open in Tokyo, where she faced Julia Görges of Germany in the first round, but lost in three sets. At the China Open, Safina lost to Vera Zvonareva in the first round. 2011: Final year At the ASB Classic in Auckland, New Zealand, Safina was defeated by No.2 seed Yanina Wickmayer in the first round. In the Hobart International, facing Marion Bartoli in the first round, she lost again in two sets. At the Australian Open, she was defeated by eventual champion Kim Clijsters in the first round with a double bagel. At the Malaysian Open, Dinara was able to end her six-match losing streak with her first win since September 2010, defeating Han Xinyun. Then she lost against Šafářová. Safina next competed at BNP Paribas Open, where she reached the fourth round, including wins over 26th seed Daniela Hantuchová and world No. 4 Samantha Stosur. Her run came to an end against Maria Sharapova in the fourth round. Safina announced she would not compete for the rest of 2011 because of a persistent back injury (stress fracture). Safina allegedly retired from professional tennis, as announced by her brother Marat Safin, on October 7, 2011: "Dinara has decided to end her career", Safin said. "She has taken the decision relatively well. She considers it just to be the end of a period in her life." Safin said the main reason for his 25-year-old sister's retirement was a chronic back injury. "Everything is all right with her health. She feels good in everyday life, but (the