SINGAPORE - The rivalry between Spaniard Carolina Marin and India's P.V. Sindhu is set for its next instalment at the Singapore Indoor Stadium, after both shuttlers won their respective round of 16 matches on Thursday at the OUE Singapore Open.

Marin, world No. 2 and reigning Olympic champion, swept aside Lee Chia-hsin of Chinese Taipei 21-7, 21-11 with little fuss.

Shortly before her match, world No. 5 and Rio de Janeiro Games silver medallist Sindhu came from behind to beat Indonesia's Fitriani Fitriani 19-21, 21-17, 21-8.

The two will clash in the quarter-finals on Friday, having met just over a week ago in the final of the India Open. Sindhu won that encounter 21-19, 21-16.

Said Marin: "Now I'm feeling really good on court, and getting some confidence in myself. Let's see who will win tomorrow. It will be a good and tough game."

It was largely safe passage for the other seeded players in the women's singles, with Japan's world No. 4 Akane Yamaguchi beating Taiwanese Hsu Ya-ching 21-19, 16-21, 23-21 in a close contest.

Last year's finalist Sun Yu of China was taken the distance by team-mate Chen Yufei but also survived 19-21, 21-13, 21-14.