It was curtains for India at the Swiss Open Grand Prix Gold after defending champion H S Prannoy was knocked out of the men's singles competition following a straight-game loss to China's Shi Yuqi in the quarterfinals at Basel in Switzerland. Fifth seed Prannoy, who had beaten Yuqi at the Badminton Asia Team Championships last year, failed to produce his best game and went down 19-21 11-21 to the second seeded Chinese.Earlier, fourth seeded Indian mixed doubles pair of Pranaav Jerry Chopra and N Sikki Reddy also had suffered a 19-21 17-21 loss to fifth seeded Chinese duo of Zhang Nan and Li Yinhui.