Defending Champion Saina Nehwal will today face seventh-seeded Tine Baun of Denmark in the quarter-finals of the Hong Kong Super Series Badminton tournament. The World Number Four Indian shuttler yesterday defeated Yao Jie of Holland in straight games 21-17, 21-17.In the Men's Singles quarter-finals, RMV Gurusaidatt will meet second seeded Chinese Long Chen while Ajay Jayaram will face top seed Malaysian Lee Chong Wei. Yesterday Gurusaidatt stunned world No. 9 Pengyu Du of China while Ajay made short work of Muhammad Hafiz Hashim of Malaysia to enter into the quarterfinals.