BWF World C'ships: Treesa-Gayatri stuns world No. 4 Chinese to secure India's first medal in women's doubles since 2011
New Delhi, Aug 21 (IANS) India's women's doubles duo of Treesa Jolly and Gayatri Gopichand have staged an upset at the BWF World Championships after handing a shock loss to the world no. 4 Chinese pair of Ji Yifan and Zhang Shuxian to enter the semifinals, confirming a medal for the country.