Indian shuttlers P.V. Sindhu and Sameer Verma advanced to the quarter-finals, while Parupalli Kashyap was knocked out of the Korea Open in the second round here on Thursday.
Olympic silver medallist Sindhu defeated Thailand's Nitchaon Jindapol 22-20 21-17 to set up a clash with Japan's Minatsu Mitani in the quarter-finals.
Sameer defeated Hong Kong's Wong Wing Ki Vincent 21-19 21-13 in 41 minutes and will face South Korean Son Wan Ho in the quarters.
Kashyap battled for an hour and 16 minutes before bowing out 16-21 21-17 16-21 against top seeded Son Wan Ho.