| Player | Previous Rank |
|---|
| 1. Serena Williams (USA) | 1 |
| Winning everything in sight! |
| 2. Maria Sharapova (RUS) | 2 |
| Has turned into a clay-court stalwart. |
| 3. Victoria Azarenka (BLR) | 3 |
| Rounds out the "Big Three." |
| 4. Agnieszka Radwanska (POL) | 4 |
| Poland's best. |
| 5. Li Na (CHN) | 5 |
| Looks like the Li Na from two years ago. |
| 6. Sara Errani (ITA) | 7 |
| One of the top clay-courters for sure. |
| 7. Petra Kvitova (CZE) | 6 |
| Too inconsistent. |
| 8. Angelique Kerber (GER) | 8 |
| Has failed to build on her strong 2012. |
| 9. Maria Kirilenko (RUS) | NR |
| First-ever trip inside this Top 10. |
| 10. Caroline Wozniacki (DEN) | 9 |
| Top-five days appear to be long gone. |
