Fifth seed Tian Houwei of China was bundled out of the Yonex Sunrise Hong Kong Open on Wednesday, suffering a surprise defeat at the hands of countryman Lee Cheuk Yiu.
Houwei was not expected to be troubled by Lee, but the qualifier pulled off a surprise 22-20, 21-19 victory to advance to the second round in Kowloon.
In a match that lasted 44 minutes, Lee drew level midway through the first game to erase Tian’s early lead, before holding on to clinch the game when Tian drew level at 20-20.
Lee then led the second game virtually from start to finish to score a big upset win.
Sixth seed Chou Tien Chen of Taipei also suffered a first-round defeat, going down 21-19, 16-21, 21-18 to Thailand’s Boonsak Ponsana.
The rest of the big guns avoided similar disaster, with the likes of third seed Jan O Jorgensen, fourth seed Son Wan Ho and seventh seed Tanongsak Saensomboonsuk all booking their places in the second round.
Other first-round winners included India’s HS Prannoy and Malaysian Chong Wei Feng.
Seventh seed Sung Ji Hyun of South Korea was the only major casualty in the women’s draw, going down 20-22, 21-14, 21-19 to Hsu Ya Ching.
Top seed Carolina Marin, fourth seed Tai Tzu Ying and fifth seed Saina Nehwal are all safely through to the second round.
There were also wins for PV Sindhu of India and Thailand’s Nitchaon Jindapol, among others.