Saina Nehwal 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.
London Olympics bronze medallist Saina needed 36 minutes to beat Mingtian Fu of Indonesia 21-16, 21-9 in a women's singles match at the SK Handball stadium.
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.