Hamburg - The American Williams sisters Serena and Venus are hard on the heels of world number one Dinara Safina in the latest WTA rankings released by the women's governing body WTA on Monday.

Safina, who enjoyed her second week at the top of the rankings, has 9,011 points, while Serena is ranked second 958 points behind.

Venus moved to third with 7,452 points. «#»

WTA top 10 as of May 11 (previous ranking in parentheses):

1. (1) Dinara Safina, Russia, 9,011 points 2. (2) Serena Williams, United States, 8,053 3. (5) Venus Williams, United States, 7,452 4. (4) Jelena Jankovic, Serbia, 7,330 5. (3) Elena Dementieva, Russia, 6,991 6. (6) Vera Zvonareva, Russia, 5,890 7. (8) Svetlana Kuznetsova, Russia, 5,206 8. (7) Ana Ivanovic, Serbia, 4,984 9. (9) Victoria Azarenka, Belarus, 4,506 10. (10) Nadia Petrova, Russia, 3,840(dpa)