Top seed Shi Yuqi is out of the Syed Modi International Badminton Championships in Lucknow ©Getty Images

Top seed Shi Yuqi of China suffered a shock first-round defeat to Malaysia's Soo Teck Zhi at the Syed Modi International Badminton Championships in Indian city Lucknow today.

Shi lost 23-25, 17-21 on the opening day of main draw action at the Badminton World Federation World Tour Super 300 event.

Soo's reward is a meeting with Canada's Bagalur Rajanna Sankeerth, a 20-22, 21-18, 21-7 winner over home player Siddharth Pratap Singh at the Babu Banarasi Das Indoor Stadium.

Among the other players to crash out of the men's event today was fifth seed Sameer Verma, beaten 21-15, 18-21, 13-21 by fellow Indian Ajay Jayaram.

There were wins, however, for third seed Srikanth Kidambi and fourth seed Bhamidipati Sai Praneeth, both of whom are from the home nation.

Spain's Carolina Marín is through to the second round of the women's singles event ©Getty Images
Spain's Carolina Marín is through to the second round of the women's singles event ©Getty Images

Kidambi defeated Russia's Vladimir Malkov 21-12, 21-11 and Sai Praneeth overcame Malaysia's Iskandar Zulkarnain 21-16, 22-20.

In the women's singles event, fourth seed Carolina Marín of Spain and fifth seed An Se Young of South Korea are both through to round two.

Marín, the reigning Olympic champion, beat Bulgaria's Linda Zetchiri 21-16, 21-11 and An defeated Israel's Ksenia Polikarpova 21-11, 21-7.

The top three seeds - He Bingjiao of China, Michelle Li of Canada and Saina Nehwal of India - had all already withdrawn from the event, alongside sixth seed Han Yue and eighth seed Cai Yanyan, both of China. 

Seventh seed Pornpawee Chochuwong of Thailand was eliminated by compatriot Phittayaporn Chaiwan following a 15-21, 22-20, 14-21 loss.