Here is the WTA Tour Rankings as of May 13, 2013. World number one Serena Williams retains the top ranking after successfully defending the Madrid Open title, defeating Maria Sharapova of Russia.
[1] Serena Williams (USA) – 11,115
[2] Maria Sharapova (RUS) – 10,690
[3] Victoria Azarenka (BLR) – 8,510
[4] Agnieszka Radwanska (POL) – 6,475
[5] Na Li (CHN) – 5,755
[6] Sara Errani (ITA) – 5,640
[7] Angelique Kerber (GER) – 5,530
[8] Petra Kvitova (CZE) – 5,225
[9] Caroline Wozniacki (DEN) – 3,625
[10] Samantha Stosur (AUS) – 3,545
