Here are the latest calendar-year WTA Race to Istanbul standings as of September 23, 2013.
[1] Serena Williams (USA) – 11,040 [Q]
[2] Victoria Azarenka (BLR) – 7,670 [Q]
[3] Maria Sharapova (RUS) – 5,891 [Q]
[4] Agnieszka Radwanska (POL) – 5,455 [Q]
[5] Na Li (CHN) – 4,990
[6] Sara Errani (ITA) – 4,170
[7] Petra Kvitova (CZE) – 3,260
[8] Marion Bartoli (FRA) – 3,173
[9] Jelena Jankovic (SRB) – 3,155
[10] Roberta Vinci (ITA) – 3,150
