Osaka, 14 October 2011 | AAP

Top-seed Samantha Stosur advanced to the quarter-finals of the WTA tournament in Osaka on Thursday with an emphatic win over local hope Misaki Doi.

The reigning US Open champion prevailed 6-2 6-4 in the second-round clash against the world No.113 to book a meeting with South Africa’s Chanelle Scheepers in the last eight of the hardcourt tournament.

Stosur captured her first-ever WTA singles title in Osaka two years ago and is looking to add to that tally before this month’s rich season-ending WTA Championships in Istanbul.

Scheepers downed Kazakhstani qualifier Yaroslava Shvedova 4-6 6-3 7-6 (7-5) in a just under two hours, while in other second-round matches, Japanese sixth-seed Ayumi Morita defeated Greece’s Eleni Daniilidou 6-2 6-3 and France’s Marion Bartoli beat American Vania King 6-1 6-2.