World number two Saina Nehwal and PV Sindhu today advanced to the pre-quarterfinals of the China Open Badminton tournament at Fuzhou. In the opening round, while top seed Saina defeated China's Sun Yu, 22-20, 21-18. Sindhu breezed past Russian Ksenia Polikarpova, 21-14, 21-9.However, in the Men's section, Ajay Jayaram and Kidambi Srikanth bowed out in the first round. Jayaram los to China's top seed Chen Long, 12-21, 11-21.Srikanth lost to Hong Kong's Hu Yun 11-21, 18-21. HS Prannoy and the pair of Jwala Gutta and Ashwini Ponappa will be seen in action later today.