The Olympic gold medal winner Rafael Nadal remains on top of the men's tennis rankings for the second week in a row while Ana Ivanovic stays on top of the women's rankings.
Ivanovic reclaimed the top spot a week ago from fellow Serb Jelena Jankovic, who enjoyed just seven days as number one.
Ivanovic led the rankings after her victory at the French Open, where she defeated Jankovic in the semi-finals.
Olympic women's doubles gold medallist Serena Williams of the United States moved up one place to third. Her sister Venus is the other American in a list dominated by six Russians, with fourth-ranked Svetlana Kuznetsova the highest.
ATP top 10 as of August 25 (previous ranking in parenthesis): 1. (2) Rafael Nadal, Spain, 6,700 points; 2. (1) Roger Federer, Switzerland, 5,930; 3. (3) Novak Djokovic, Serbia, 5,105; 4. (4) David Ferrer, Spain, 2,865; 5. (5) Nikolay Davydenko, Russia, 2,700; 6. (6) Andy Murray, Britain, 2,415; 7. (8) David Nalbandian, Argentina, 1,975; 8. (9) Andy Roddick, United States, 1,845; 9. (7) James Blake, United States, 1,725; 10. (10) Stanislas Wawrinka, Switzerland, 1,670.
WTA top 10 as of August 25 (previous ranking in parenthesis): 1. (1) Ana Ivanovic, Serbia, 3,612,00; 2. (2) Jelena Jankovic, Serbia, 3,515.00; 3. (4) Serena Williams, United States, 3,341,00; 4. (3) Svetlana Kuznetsova, Russia, 3,181,00; 5.(6) Maria Sharapova, Russia, 3,131,00; 6. (5) Elena Dementieva, Russia, 3,070,00; 7. (7) Dinara Safina, Russia, 3,047,00; 8. (8) Venus Williams, United States, 2,586,00; 9. (11) Anna Chakvetadze, Russia, 2,230,00; 10. (9) Vera Zvonareva, Russia, 2,117,00.
