Sharapova marches on in Tokyo

Updated: September 26, 2012

Maria Sharapova a twice winner of the Pan Pacific advanced to the quarterfinals with a comfortable 6-2,7-6 win over Lucie Safarova of the Czech Republic.

Sharapova will play eighth seed Samantha Stosur of Australia, who defeated Dominika Cibulkova of Slovakia 6-4, 7-5.

On a day of few surprises, defending champion Agnieszka Radwanska of Poland beat qualifier Jamie Hampton of the United States 6-4, 6-3.

Sixth seed Sara Errani of Italy outclassed ninth seed Marion Bartoli of France 3-6, 6-2, 6-2, while fifth seed Angelique Kerber of Germany overwhelmed Urszula Radwanska of Poland 6-1, 6-1.

Nadia Petrova of Russia defeated plucky Petra Martic of Croatia 7-6 (7/2), 6-7 (1/7), 6-4.