Seeds progress in Canada

Marc Zwiebler, the number one seed in the men's singles, was one of those who didn't have matters all their own way. The German recovered from a mid-match wobble to beat Yang Chih Chieh of Chinese Taipei 21-19, 19-21, 21-17 in a marathon encounter that lasted 66 minutes.

Second seed Xue Song was also taken to three games, with the Chinese shuttler requiring 57 minutes to beat Rasmus Fladberg of Denmark 21-16, 15-21, 21-7.

There were no such problems for Malaysian ace Lee Chong Wei who eased past Shi Yuqi 31-14, 21-15, while third seed Hsu Jen Hao and fifth seed Wong Wing Ki Vincent also recorded comfortable victories.

In the women's singles, second seed Beiwen Zhang survived a scare as the American was forced to dig deep to beat Chinese Taipei's Hsu Ya Ching 21-15, 23-25, 21-14.

Local hope Michelle Li had to dig deep to keep her title hopes alive, the Canadian requiring one hour and eleven minutes to beat Yaying Shen of China 21-18, 20-22, 21-16.

In the men's doubles, the top ranked pair of Andrei Adistia and Hendra Aprida Gunawan opened their account with a comprehensive 21-13, 21-13 win over Puavaranukroh Dechapol and Kedren Kittinupong in just 23 minutes. 

There was one upset in the division, with the sixth-seeded American pair of Phillip Chew and Sattawat Pongnairat beaten 21-19, 23-21 by Ko-Chi Chang and Tzu Wei Wang of Chinese Taipei.

In the women's doubles, all the seeded pairings were handed byes into the second round. Hong Kong's Poon Lok Yan and Tse Ying Suet were among those to book their place in the second round, beating the Canadian duo of Joanne Yu Chen and Kyleigh O’Donoghue 21-9, 21-8.