CHANGZHOU, Jiangsu Province, Sept. 16 (Xinhua) -- Mixed doubles pair Yohan Hadikusumo Wiratama and Hoi Wah Chau became the first high-profile casualties at the China Masters badminton tournament here on Wednesday.

    2009 South Korean Open bronze medalists Wiratama and Chau from Hong Kong, China were surprised by Chinese teenage pair Chai Biao and Xia Huan 21-17, 21-19 in 30 minutes in the first round of the super series event.

    "It is the first time we played this pair," said Chau. Chau and Wiratama, seeded number four here, defeated Chai Biao and Bao Yixin in May's national games qualifier before they booked a place in the final to be held in October in Shandong province.

    Unlike many other Chinese players who took the Masters as a tune-up for the national games, Chau said it was just a normal tournament for them and complained about the judge.

    "I don't think the judges are very good," she said.

    Changzhou native Lu Lan eased into the women's singles second round as the fifth seed brushed aside compatriot Zhu Lin 21-13, 21-9.

    In men's singles, Denmark's fifth seed Joachim Persson beat Chinese Liu Jingru 21-16, 21-15.