Defending champion Saina Nehwal and R.M.V. Gurusaidutt and Ajay Jayaram won their respective matches to advance to the quarter-finals of the Indonesia Open Super Series Premier here Thursday.

In women’s singles, World No.2 Saina defeated unseeded Japanese Sayaka Takahashi 21-13, 21-19 in 39 minutes in their first ever career meet at the Istora Gelora Bung Karno Stadium. The second seed will face Spaniard Carolina Marin in their first ever encounter in a last eight clash Friday.