Lakshya Sen fights back from losing the opening game to beat Austria’s Collins Valentine Filimon 16-21, 21-8, 21-4 and reach the World Championships’ second round. Treesa Jolly and Gayatri Gopichand also advance after defeating 16th seeds Lam/Lee in straight games. Unnati Hooda progresses too, while India’s mixed doubles pairs suffer opening-round exits.