Romania's Simona Halep returns a shot during the semifinal match against Serbia's Ana Ivanovic at the WTA Tournament of Champions in Sofia, Bulgaria, Nov. 2, 2013. Halep won 2-1. (Xinhua/Liu Zai)
Australia's Samantha Stosur returns a shot during the semifinal match against Russia's Anastasia Pavlyuchenkova at the WTA Tournament of Champions in Sofia, Bulgaria, Nov. 2, 2013. Stosur won 2-1. (Xinhua/Chen Hang)
Australia's Samantha Stosur reacts during the semifinal match against Russia's Anastasia Pavlyuchenkova at the WTA Tournament of Champions in Sofia, Bulgaria, Nov. 2, 2013. Stosur won 2-1. (Xinhua/Liu Zai)