Saina Nehwal and P V Sindhu marched into the women's quarterfinals but all the top four seeds, including defending champion P. Kashyap, crashed out of the men's event in the Syed Modi International India Grand Prix Lucknow on Thursday.The 16h seed Shubhakar Dey defeated second seed Ajay Jayaram 21-19, 21-17 and 12th seed Zulfadli Zulkiffli of Malaysia beat top seed Kashyap 21-16 21-12.