Top seed Jan O Jorgensen sailed into the quarter-finals of the German Open on Thursday night.
The Danish shuttler needed just 37 minutes to dispatch South Korean Lee Dong Keun 21-10, 21-14.
Jorgensen moves on to face Chinese fifth seed Tian Houwei, who advanced when his third-round opponent, Tien Minh Nguyen, retired hurt. Tian had just taken the first game 21-9.
Second seed Lin Dan was in action later in the evening, beating Raul Must 21-17, 21-8. Next up for Dan is 16th seed Sho Sasaki.
In the match between 12th seed Ng Ka Long Angus and sixth seed Kidambi Srikanth, it was the Hong Kong shuttler who emerged victorious, coming from a game down to record an 18-21, 21-18, 21-18 victory.
Long moves on to face fourth seed Chou Tien Chen of Chinese Taipei, who beat ninth seed Hu Yun of China 11-21, 21-17, 21-19 in another enthralling encounter.
Others to advance to the last eight included eighth seed Son Wan Ho of South Korea and 10th seed Wei Nan from Hong Kong.
There were no major upsets in the women’s draw, with all of the top seeds booking their places in the quarter-finals.
Top seed Li Xuerui of China wasted little time in dispatching Busanan Ongbumrungphan 21-15, 21-12, while third seed Sung Ji Hyun also looked comfortable in her 21-8, 21-17 victory over Yip Pui Yin.
Sung moves on to face fifth seed Nozomi Okuhara, who was given a surprisingly stern test by her compatriot and qualifier Aya Ohori before eventually winning 21-8, 16-21, 21-16.
Joining Sung in the quarter-finals is fellow Japenese player and sixth seed Akane Yamaguchi, who defeated Bae Yeon Ju 22-20, 22-20.
Another Chinese player, fourth seed Wang Shixian, advanced in straight games over Lindaweni Fanetri, winning 21-10, 21-17. She moves on to face seventh seed Pusarla V. Sindhu of India.