Top seed Kento Momota comfortably beat fellow Japanese player Kanta Tsuneyama to book his place in the men's singles semi-finals at the Badminton World Federation German Open in Mülheim.
The reigning world champion beat his seventh-seeded opponent 21-12, 21-9 at the Innogy Sporthalle.
Next up for Momota is Denmark’s Hans-Kristian Solberg Vittinghus after he defeated Malaysia’s Soong Joo Ven 21-13, 18-21, 21-15.
The other semi-final pits two-time defending champion Chou Tien Chen of Chinese Taipei against Japan’s Kenta Nishimoto.
Second seed Chou overcome Malaysia’s Lee Zii Jia 21-18, 21-20, while third seed Nishimoto beat Thailand’s Kantaphon Wangcharoen 21-16, 22-20.
In the women’s event, top seed Nozomi Okuhara of Japan is through to the semi-finals thanks to a 21-11, 21-13 victory over compatriot Aya Ohori.
Awaiting Okuhara in the last four is third-seeded Thai Ratchanok Intanon, a 21-7, 21-12 winner at the expense of Singapore’s Yeo Jia Min.
Also through to the penultimate round is Japan’s Akane Yamaguchi, the reigning champion, after she defeated fellow countrywoman Sayaka Takahashi 21-19, 22-20.
Standing between her and a place in the final is Malaysia’s Goh Jin Wei, who recorded an impressive 21-19, 19-21, 21-16 win over fourth seed Zhang Beiwen of the United States.
Action in Mülheim continues tomorrow.