Ace Indian shuttlers, Saina Nehwal and P. Kashyap, have stormed into their respective quarterfinals of the All England Open Badminton Championship in Birmingham. In the Women's Singles pre-quarterfinal on late Thursday night, London Olympics Bronze Medalist and second seed Saina defeated Belaetrix Manupati of Indonesia, 21-16, 21-11.In the Men's Singles, London Olympics quarterfinalist P. Kashyap beats seventh seeded Japanese Kenichi Tago, 21-18, 21-12 to make it to the last eight stage.For a semi-final berth, both players will battle it out against the experienced Chinese shuttlers today.