Top seed Kidambi Srikanth of India and Malaysian ace Lee Chong Wei both booked their places in the quarter-finals of the Asia Championships in China.
Srikanth barely broke a sweat after his opponent Wong Wing Ki Vincent was forced to retire just nine points into their contest. The Indian shuttler was leading 7-2 at the time.
Chong Wei faced a much trickier challenge in Indonesia’s Anthony Ginting, and was forced to battle back from a game down before securing a 16-21, 21-9, 21-11 victory.
Srikanth and Chong Wei will now face each other on Friday for a place in the semi-finals.
Elsewhere, Chinese duo Chen Long and Shi Yuqi, the third and fourth seeds, suffered differing fortunes, with Chen dispatching B. Sai Praneeth 21-12, 21-12 and Yuqi going down 21-15, 12-21, 21-12 to Kento Momota.
South Korean second seed Son Wan Ho also advanced safely to the last eight after beating Kanta Tsuneyama 21-5, 21-17.
There was one big upset in the women’s draw as fourth seed Ratchanok Intanon suffered a 19-21, 21-17, 21-15 defeat to Lee Jang Mi.
The other top seeds all advanced safely, including World No 1 Tai Tzu Ying, P.V. Sindhu and Chen Yufei.