Saina Nehwal has entered the pre-quarterfinal of the World Badminton championship being played at Copenhagen, Denmark. Saina defeated Russian Natalia Perminova 21-11, 21-09. In the Men's singles, Ajay Jairam got bye in the first round. On the opening day yesterday, Commonwealth Games gold medallist, Parupalli Kashyap crashed out after suffering a shocking first-round defeat against Dieter Domke of Germany in the men's singles. The World No. 27 Indian, who had clinched the biggest title of his career at Glasgow early this month, played his heart out before going down fighting 24-26, 21-13, 18-21 in a nerve-wrecking battle.In the mixed doubles, the Indian pair of Arun Vishnu and Aparna Balan today lost to sixth seed German pair of Michael Fuchs and Birgit Michels 21-14, 21-11.