The BWF World Championships return to India after seventeen years. Five reigning champions arrive in New Delhi with pressure to defend their titles. Shi Yu Qi and Akane Yamaguchi aim to retain their singles crowns. Kim Won Ho/Seo Seung Jae and Liu Sheng Shu/Tan Ning also defend doubles titles. Chen Tang Jie/Toh Ee Wei seek to prove their mixed doubles win was just the start.