Olympic silver medallist PV Sindhu and former champion Kidambi Srikanth advanced to the quarter-finals along with two other Indians at the Swiss Open badminton tournament here on Thursday.

On Wednesday, Saina Nehwal lost 16-21, 21-17, 21-23 to Phittayaporn Chaiwan of Thailand in the first round. While Sindhu and Srikanth had contrasting wins, Ajay Jayaram and B Sai Praneeth too dished out superlative performances to make it to the Last 8.