Marat Safin says that his younger sister Dinara Safina's career is over. Former No. 1 Safina has struggled tremendously with a back injury over the past two years and has not played since May.

LONDON(AP) Dinara Safina officially took over the top ranking on the WTA Tour on Monday, making her and older sibling Marat Safin the only brother-sister duo to have been No. 1 in professional tennis.