Then she lost against Safarova. 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 back injury means) she simply can't play tennis professionally any more." However, Dinara Safina herself later that day issued a Twitter message, where she said she had not made any retirement decision yet, and that she needed more time to decide. Dinara announced on June 12, 2012 that she requested wildcards for the Bank of the West Classic in Stanford, the Montreal Open, the Cincinnati Open and the US Open. In a later interview, she announced that she withdrew the requests for wildcard entries for all tournaments for 2012. In late 2012, Safina was linked to doping doctor Luis Garcia del Moral. In 2014, Safina officially retired from tennis after the final day of Madrid Open following years of injuries. Safina and fellow Russian Svetlana Kuznetsova met 14 times, with Safina leading their head-to-head 8–6. Kuznetsova led their rivalry on clay courts but trailed their rivalry on hard courts. The pair never met on grass. Their last meeting was in the final of the 2009 French Open, with Kuznetsova winning in straight sets and reversing a semi-final loss to Safina from twelve months earlier. Safina and Dementieva have been playing each other since 2003, four times on clay, five times on hard and one on grass and carpet, their series ended 6–5 in Dementieva's favour. Their most significant meeting was at the final of the 2008 Summer Olympics which Dementieva won in three sets and a gold medal for Russia.