Saina Nehwal [ Images ] sailed into the quarter-finals with a straight games victory, but it was curtains for Parupalli Kashyap and P V Sindhu in the second round of the Korea Open Super Series Premier, in Seoul, on Thursday.
The world No 3 Indian ace will next take on Lin Han of China, against whom she has a 2-0 record.
Han beat Tzu Ying Tai of Chinese Taipei 21-16, 21-16 in another match.
Olympic quarter-finalist Kashyap played his heart out and was one game up, but seventh seed Yun Hu of Hong Kong rallied splendidly to notch a 16-21, 21-13, 21-17 victory over the Indian in the men's singles.
World No 17 Sindhu also failed to cross the second round, going down 19-21, 13-21 to Thailand's Porntip Buranaprasertsuk in a 31-minute women's singles match.
Sindhu had beaten the Thai girl twice before. The world No 13 set up a clash with Korea's Ji Hyun Sung, who stunned seventh seeded Chinese Yanjiao Jiang 21-10, 21-17.