Serbia's Jelena Jankovic, who won the Kremlin Cup tournament in Moscow on Sunday, heads the rankings with Russia's Dinara Safina, 22, moving up to second place to become only the fourth Russian woman to reach the top two since the rankings started 33 years ago.
Third place is taken by U.S. Open champion Serena Williams.
Olympic gold medalist Elena Dementieva moved down a place to fifth, while her compatriot Maria Sharapova was a non-mover in sixth, along with Svetlana Kuznetsova in seventh. But Kremlin Cup finalist 24-year-old, Vera Zvonareva, who beat second-placed Safina in the semifinals, moved up a place to eighth, her highest career ranking.
Two other Russian players are sitting just outside the top ten with Anna Chakvetadze, 21, in 12th place and Nadezhda Petrova, 26, moving up to 13th.
Women's Tennis Association top 10 ranking list.
1 (1) Jelena Jankovic Serbia
2 (3) Dinara Safina Russia
3 (2) Serena Williams U.S.
4 (5) Ana Ivanovic Serbia
5 (4) Elena Dementieva Russia
6 (6) Maria Sharapova Russia
7 (7) Svetlana Kuznetsova Russia
8 (9) Vera Zvonareva Russia
9 (8) Venus Williams U.S.
10 (10) Radwanska Agnieszka Poland