Ratchanok Intanon and Pornpawee Chochuwong advanced to the quarter-finals of the US$1 million (32.5 million baht) BWF Singapore Open on Thursday, but defending champion Kunlavut Vitidsarn retired with an injury.
Sixth seed Ratchanok, winner of the Malaysia Masters on Sunday, moved past Japan's Natsuki Nidaira 21-10, 21-16 while Pornpawee ousted Taiwan's Lin Hsiang-ti 21-15, 21-16.