Defending champion Saina Nehwal, RMV Gurusaidutt and Ajay Jayaram have advanced to the quarterfinals of the Indonesian Super Series Premier Badminton tournament. In the second round of the Women's Singles at Jakarta yesterday, World Number Two Saina outplayed Sayaka Takahashi of Japan 21-13, 21-19 in 39 minutes. The second seeded Indian will take on Carolina Marin of Spain in the quarters today.In the Men's Singles, Jayaram defeated Indonesian fourth seed Sony Dwi Kuncoro and in another match, Gurusaidutt prevailed over Kazumasa Sakai of Japan.In the quarter-finals, while Jayaram meets Marc Zwiebler of Germany while Gurusaidatt faces Tommy Sugiarto of Indonesia.