Top-seeded Li Na advanced to the second round of the Shenzhen Open by beating Vera Zvonareva of Russia 7-5 6-3 on Tuesday.
Monica Niculescu of Romania also advanced, beating Anna Schmiedlova of Slovakia 4-6 6-2 6-3.
Also, Yung-Jan Chan of Taiwan defeated Zhang Shuai of China 3-6 6-4 6-2 and Timea Babos of Hungary advanced when Nadiya Kichenok of Ukraine retired while trailing 6-0 2-0.
In the second round, Peng Shuai of China beat Silvia Soler-Espinosa of Spain 6-3 6-3.
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