Serena Williams get the WTA 2013 Year-End No.1 Singles award in a Award Ceremony during WTA tennis championships match at Sinan Erdem Dome in Istanbul, October 25, 2013. (Xinhua/Lu Zhe) 

Sara Errani (R2) and Roberta Vinci (R1) get the WTA 2013 Year-End No.1 Doubles Team award and Serena Williams (L2) get the WTA 2013 Year-End No.1 Singles award in a Award Ceremony during WTA tennis championships match at Sinan Erdem Dome in Istanbul, October 25, 2013. (Xinhua/Lu Zhe)

Sara Errani (L) and Roberta Vinci get the WTA 2013 Year-End No.1 Doubles Team award in a Award Ceremony during WTA tennis championships match at Sinan Erdem Dome in Istanbul, October 25, 2013. (Xinhua/Lu Zhe)