Moscow - Former world number one Dinara Safina has retired from professional tennis, her elder brother Marat told media on Friday.
"Dinara (Safina) 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."
Safina last competed on the women's tour in April in Madrid, losing her round of 32 match to Germany's Julia Goerges.
Safina, who won Olympic silver at Beijing in 2008, played three Grand Slam finals and won 12 singles and nine doubles WTA titles during her career. She climbed to the top of the women's rankings on April 20, 2009.