The Tokyo 2020 women's singles Olympic silver medallist from Chinese Taipei overcame her Japanese opponent 21-10, 21-11 at the Utilita Arena, and admitted she was surprised at the emphatic nature of her victory.

"I did not expect to win so convincingly," Tai said.

"It’s always tough when you play Japanese players because (you) have to concentrate on every point.

"I’m most pleased that I did not make any mistakes.

"I needed to focus because I haven’t played her in a long time and she is really fast-paced on court.

"I tried to match her speed.

"I hope I have the same conditions and the same performance tomorrow."

The top four seeds all advanced in the women's singles competition.

Tai will face South Korea's An Se-young in the semi-finals after she cruised past the United States' Iris Wang 21-12, 21-9.

Reigning Olympic champion Chen Yufei of China is through after receiving a walkover against compatriot He Bingjiao.

She will play the world champion Akane Yamaguchi, who beat fellow Japanese player Sayaka Takahashi.

In the men's singles, the headline match-up involved second seed Kento Momota of Japan, who fell in three games 21-7, 13-21, 21-11 to Malaysia's defending champion Lee Zii Jia.

Lee will face the unseeded Lakshya Sen of India in the last four after he was granted a walkover against China's Lu Guangzu.

Tokyo 2020 Olympic gold medallist Viktor Axelsen of Denmark had few difficulties in his 21-4, 21-9 win against Indonesian fifth seed Anthony Sinisuka Ginting.

In the other quarter-final, Chinese Taipei's fourth seed Chou Tien-chen defeated Jonatan Christie of Indonesia 21-10, 21-15.

Tomorrow is set to be the penultimate day of competition at the All England Open Badminton Championships, featuring the singles semi-finals.