Cape Town - Danish fifth seed Caroline Wozniacki defeated Zheng Saisai of China to reach the second round of the Hong Kong Open on Tuesday.
Wozniacki needed one hour and 35 minutes to down Zheng 6-1, 6-4.
The opening set started with Wozniacki dropping her serve but she bounced back to break Zheng's serve three times and claim the set 6-1 converting her first set point.
The second set started off with the Dane looking well in charge of proceedings when she broke her opponent's serve in the third and fifth games to lead 4-1.
When serving for the match leading 5-2 Wozniacki failed to convert any of her four match points and Zheng broke back and then held her own serve, saving another match point to make the score 4-5.
The fifth seed served out the match to win the set 6-4 and set up a second round clash against Britain's Heather Watson, who beat Marina Erakovic of New Zealand 7-5, 7-6(9).
In some other first-round results, Serbian seventh seed Jelena Jankovic hammered Samantha Crawford of the US 6-3, 6-1 and in an upset, unseeded Nao Hibino of Japan beat Australian fourth seed Samantha Stosur 6-3, 6-4.
Bethanie Mattek-Sands of the US cruised past Basak Eraydin of Turkey 6-1, 6-2 and China's Wang Qiang beat Zhang Ling of Hong Kong 6-2, 6-2.