Sara Errani almost dropped her first match of the season to China's Zheng Saisai.
Zhong Zhi/Getty Images

BEIJING (AP) -- Second-seeded Sara Errani and third-seeded Klara Zakopalova advanced to the second round of the Shenzhen Open on Monday.

Errani beat Chinese wildcard Zheng Saisai 6-0, 3-6, 7-6 (3), and Zakopalova defeated 17-year-old Donna Vekic of Croatia 6-3, 7-5.

Also, Bojana Jovanovski of Serbia, a quarterfinalist last year, lost to German qualifier Anna-Lena Friedsam 6-1, 7-5, Vania King beat Petra Martic 7-5, 4-6, 6-3 and Zheng Jie defeated Shahar Peer 6-0, 6-3.

Top-seeded Li Na was scheduled to play Vera Zvonareva on Tuesday. Li won the inaugural Shenzhen Open title in January.

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