Rio Olympic silver medallist, Sindhu, who clinched the India Open earlier this month, had to toil hard before prevailing 19-21 21-17 21-8 over Indonesian World No. 27 Fitriani Fitriani in a match that lasted an hour at Singapore Indoor Stadium.

Sindhu will take on familiar foe Carolina Marin in the quarter-final.

Praneeth, who reached the finals at Syed Modi Grand Prix Gold in January, produced a gritty performance to see off China’s Qiao Bin 21-15 21-23 21-16 in an hour and 12 minutes.

The World No. 30 Indian Praneeth will clash with eighth seeded Tanongsak Saensomboonsuk of Thailand next.

B Sumeeth Reddy and Ashwini Ponnappa, who reached the finals at Lucknow in January, eked out a thrilling 17-21 21-17 21-16 win over Korean pair of Jae Hwan Kim and Lee So Hee to also reach the quarterfinals.

The Indian pair will take on third seeded Chinese combo of Lu Kai and Huang Yaqiong.

All images: PTI