TOP 10 U.S. WOMEN'S RANKINGS
2010
1. Serena Williams
2. Venus Williams
3. Bethanie Mattek-Sands
4. Melanie Oudin
5. Varvara Lepchenko
6. Vania King
7. Jill Craybas
8. Coco Vandeweghe
9. Christina McHale
10. Alison Riske
2011
1. Serena Williams
2. Christina McHale
3. Bethanie Mattek-Sands
4. Vania King
5. Irina Falconi
6. Sloane Stephens
7. Venus Williams
8. Coco Vandeweghe
9. Varvara Lepchenko
10. Tetiana Luzhanska
2012
1. Serena Williams
2. Varvara Lepchenko
3. Venus Williams
4. Christina McHale
5. Sloane Stephens
6. Vania King
7. Jamie Hampton
8. Melanie Oudin
9. Lauren Davis
10. Coco Vandeweghe