Li Na through, Kvitova out

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Updated: September 25, 2012

Former French Open champion Li Na advanced to the last 16 of the Pan Pacific Open when she defeated Russia’s Anastasia Pavlyuchenkova 7-5 4-6 6-2.

2011 Wimbledon champion Petra Kvitova was bundled out in the first upset in Tokyo, suffering a 6-4 6-4 defeat by Croatia’s Petra Martic.

Martic next faces Russia’s Nadia Petrova after the 17th seed beat Romania’s Simona Halep 7-6 6-0.

Germany’s Angelique Kerber made short work of Japanese wildcard Ayumi Morita, the fifth seed comfortably winning 6-3 6-4 to reach the third round.

Sixth seed Sara Errani of Italy beat Sweden’s Johanna Larsson 6-3 7-6 and next faces Frenchwoman Marion Bartoli after the ninth seed’s 6-2 7-5 win over German Julia Goerges.

Maria Sharapova also advanced to the last 16 over British qualifier Heather Watson 6-7 6-3 6-4.

World No 1 Victoria Azarenka crushed Austrian Tamira Paszek 6-1 6-1 and booked her spot in the third round.