Ana Ivanovic (1st R) of Serbia and Tsvetana Pironkova (1st L) of Bulgaria pose before their women's singles match at WTA Tournament of Champions in Sofia, Bulgaria, on Oct. 29, 2013. Ivanovic won 2-0. (Xinhua/Chen Hang)
Ana Ivanovic of Serbia celebrates after winning the women's singles match against Tsvetana Pironkova of Bulgaria at WTA Tournament of Champions in Sofia, Bulgaria, on Oct. 29, 2013. Ivanovic won 2-0. (Xinhua/Liu Zai)
Ana Ivanovic of Serbia hits a return during the women's singles match against Tsvetana Pironkova of Bulgaria at WTA Tournament of Champions in Sofia, Bulgaria, on Oct. 29, 2013. Ivanovic won 2-0. (Xinhua/Chen Hang)
Ana Ivanovic of Serbia hits a return during the women's singles match against Tsvetana Pironkova of Bulgaria at WTA Tournament of Champions in Sofia, Bulgaria, on Oct. 29, 2013. Ivanovic won 2-0. (Xinhua/Liu Zai)
Ana Ivanovic of Serbia autographs after winning the women's singles match against Tsvetana Pironkova of Bulgaria at WTA Tournament of Champions in Sofia, Bulgaria, on Oct. 29, 2013. Ivanovic won 2-0. (Xinhua/Chen Hang)
