Saina Nehwal sailed into the quarter-finals with a straight games victory, but it was curtains for Parupalli Kashyap and P V Sindhu in the second round of the Korea Open Super Series Premier, in Seoul, on Thursday. London Olympics bronze medallist Saina needed 36 minutes to beat Mingtian Fu of Indonesia 21-16, 21-9 in a women's singles match at the SK Handball stadium.