In pics: All England Badminton 2020 day 4

Denmark's Anders Antonsen (L) retires injured during the men's singles semifinal match with Chinese Taipei's Chou Tien Chen (R) at All England Badminton 2020 in Birmingham, Britain on March 14, 2020. Chou Tien Chen passed through to the final after Anders Antonsen retired injured during the first game. (Photo by Tim Ireland/Xinhua)