Saina Nehwal has entered the women's singles pre-quarterfinals of the World Badminton championships. At Glasgow, Scotland, today, the 12th seeded Indian defeated Sabrina Jaquet of Switzerland in straight games 21-11, 21-12.In Men's Singles, B. Sai Praneeth has also reached the pre-quarterfinals after defeating Antony Ginting of Indonesia. Ajay Jayaram, Kidambi Srikanth and Sameer Verma will all shuttle it out for pre-quarterfinal berths today.Rituparna Das and Tanvi Lad will also be seen in the second round action today. Yesterday, PV Sindhu advanced to the pre-quarterfinals.