London Olympics bronze medallist Saina Nehwal won her opening match but Lakshya Sen and B Sai Praneeth made first round exits from the Badminton Asia Championships here on Wednesday.

Saina, who has been on a comeback trial after recovering from some nagging injuries, eked out a 21-15 17-21 21-13 win over Sim Yujin of South Korea.

But world championships bronze medal winner Sen was stunned by the unseeded Li Shi Feng of China.

The fifth seed Indian lost 21-12 10-21 19-21 in his opening round men's singles tie that lasted 56 minutes.

World no 19 Praneeth suffered a straight game 17-21 13-21 defeat against Jonatan Christie of Indonesia.

It was also the end of the road for Aakarshi Kashyap, who lost 15-21 9-21 against Japanese top seed Akane Yamaguchi in the women's singles.

Both the women's doubles pair of Ashwini Bhat K and Shikga Gautam and Simran Singhi and Ritika Thaker also made opening round exits after losing in straight games.