Supak Jomkoh and Kittinupong Kedren won in three games in the men's doubles to put Thailand in front, beating He Jiting and Tan Qiang 11-21, 21-8, 21-11 at Energia Areena.

Olympic champion Chen Yufei won 21-12, 21-10 against Busanan Ongbamrungphan to equal the scoring in the women's singles, but Thailand went 2-1 up when Kunlavut Vitidsarn beat Shi Yu Qi 21-17, 21-17.

The comeback started in the women's doubles as Cheng Qingchen and Jia Yifan won 21-4, 21-12 over Jongkolphan Kititharakul and Rawinda Prajongjai, and Wang Yilyu and Huang Dongping turned the tie around for China by beating Dechapol Puavaranukroh and Sapsiree Taerattanachai 21-8, 21-15.

In the other Group A match, India defeated Finland 4-1.

M.R. Arjun and Ashwini Ponnappa won the opening match in the mixed doubles 21-9, 21-14 against Anton Kaisti and Jenny Nystrom, and Srikanth Kidambi put India in front by two by beating Kalle Koljonen 16-21, 21-14, 21-11 in the men's singles.

Malvika Bansod won the women's singles against Nella Nyqvist 21-16, 21-11, but Finland's Kaisti and Jesper Paul pulled one back for the hosts in the men's doubles, defeating Arjun and Dhruv Kapila 22-20, 21-19.

Tanisha Crasto and Rutaparna Panda defeated Mathilda Lindholm and Nystrom in the women's doubles to conclude the match, with the score finishing 21-12, 21-13.

Indonesia defeated Denmark 3-2 in the battle for top of Group C and were helped by Marcus Fernaldi Gideon and Kevin Sanjaya Sukamuljo beating Mads Pieler Kolding and Frederik Søgaard 21-19, 21-15.

Denmark won both singles matches, starting with Mia Blichfeldt in the women's singles, beating Putri Kusuma Wardami 21-11, 16-21, 21-14; Anders Antonsen beat Anthony Sinisuka Ginting 21-9, 21-15 in the men's singles.

Two doubles victories put Indonesia top of the group - first, Greysia Polii and Apriyani Rahayu won 21-17, 21-9 in the women's doubles against Maiken Fruergaard and Sara Thygesen.

Praveen Jordan and Melati Daeva Oktavianti then beat Mathias Thyrri and Amalie Magelund 21-8, 21-17 in the mixed doubles.

Finally, the National Badminton Federation of Russia thumped Canada 5-0.

Rodion Alimov and Alina Davletova started the one-sided affair with a 21-14, 21-11 win over Nyl Yakura and Crystal Lai in the mixed doubles, followed by Vladimir Malkov's 21-19, 15-21, 21-11 victory against B.R. Sankeerth in the men's singles.

Evgeniya Kosetskaya defeated Rachel Chan 21-18, 21-15 in the women's singles and the pairing of Vladimir Ivanov and Ivan Sozonov won the men's doubles match against Yakura and Brian Yang 21-14, 21-15.

Davletova and Ekaterina Malkova completed the match, beating Catherine Choi and Lai 21-11, 21-16 in the women's doubles.

The other two groups will be completed tomorrow, when China, Indonesia, Denmark and Thailand will learn their quarter-final opponents.