Olympic medallist shuttler P.V. Sindhu suffered an unexpected loss in the second round, but Kidambi Srikanth and Sameer Verma advanced to the quarterfinals to keep India’s flag flying at the Hong Kong Open World Tour Super 500 tournament, here, on Thursday.

World no. 4 Sindhu, who was seeded third, here, was shown the door by Hyun Ji Sung of Korea 24-26, 20-22 in fighting a 59-minute duel.

With Sindhu’s exit, India’s challenge ended in the women’s singles after Saina Nehwal had made a first round exit.