Olympic silver-medallist P V Sindhu and male singles shuttler Ajay Jayaram advanced to the quarterfinals after registering thrilling three-game wins over their respective opponents in the second round of the China Super Series Premier, in Fuzhou today.Seventh seeded Sindhu survived a scare from USA's Beiwen Zhang before notching up a 18-21, 22-20, 21-17 victory in a women's singles match. Sindhu will next take on China's He Bingjiao.Jayaram too had to work hard to surpass Wei Nan as he notched up a 20-22, 21-19, 21-12 win over the Hong Kong shuttler. The three-time Dutch Open champion, Jayaram will face reigning Olympic champion and two-time World champion and All England champion Chen Long of China in the next round. However, it was curtains for Swiss Open winner HS Prannoy after he suffered a 17-21, 19-21 loss to Qiao Bin of China in another men's singles match.