Indian shuttlers Saina Nehwal and Sourabh Varma have advanced into their respective Singles pre-quarterfinals of the Denmark Open Super Series Badminton tournament in Odense. Saina defeated Yeon Ju Bae of Korea in straight games, 21-17, 21-17 in the opening round of the Women's Singles event yesterday.In the Men's Singles opening round, Sourabh beat Peter Hoeg Gade of Denmark, in straight games, 21-18, 21-14.