Japan's top seeds in the women's doubles, Yuki Fukushima and Sayaka Hirota, received a bye in the first round but were undone by unseeded pair Chang Ye Na and Jung Kyung Eun from South Korea in their first outing today.

Their defeat at the World Tour Super 750 event also came in straight games with the South Koreans taking the victory, 21-13, 21-11 in 37 minutes at Fuzhou's Haixia Olympic Sport Centre.

However, Japan's second seeds, Misaki Matsutomo and Ayaka Takahashi, did advance to the quarter-finals with a 24-22, 21-15 win over China's Dong Wenjing and Feng Xueying.

In the women' singles, Japan’s second seed Akane Yamaguchi was defeated in straight sets by American Beiwen Zhang, 21-18, 21-18.

The unseeded player knocked out the Japanese player in less than 40 minutes.

In the men's and mixed competitions, the top seeds fared better.

In the men's doubles, the top two seeds are intact as Indonesia's Marcus Fernaldi Gideon and Kevin Sanjaya Sukamuljo, and home favourites Li Junhui and Liu Yuchen, won their second round matches in straight games.

Gideon and Sukamuljo beat South Korea's Min Hyuk Kang and Kim Won Ho, 21-18, 21-11, while Li and Lui overcame compatriots Ou Xuanyi and Ren Xiangyu, 21-16, 21-14.

Chinals top seeds Zheng Siwei and Huang Yaqiong beat compatriots Ren Xiangyu and Zhou Chaomin, 21-18, 21-9 to advance to the quarter finals of the mixed doubles.

In the menls singles, top seed Kento Momota of Japan will face South Koreals Son Wan Ho in the quarter-finals after the reigning world champion beat Denmark's Hans-Kristian Solberg, 21-13, 21-15.

Seventh seed Son dropped the first game against China's Huang Yuxiang today but recovered to win 20-22, 21-12, 21-9.

China's Shi Yuqi is also through after the second seed defeated Japan’s Kazumasa Sakai, 21-14, 21-17 in 37 minutes.