In the ATP Dubai Open Tennis Championships, the Indian duo of Mahesh Bhupathi and Rohan Bopanna has waltzed into the quarterfinals of the Men's Doubles category. In the pre-quarterfinals on wednesday, the fourth seeded Indian duo defeated the Ukranian-Czech combine of Alexandr Dolgopolov and Lukas Dlouhy in straight sets, 6-4, 7-5.<br/><br/>Although, the Indo-Serbian pair of Leander Peas and Janko Tipsarevic bowed out of the tournament after losing their pre-quarterfinal match. The Indo-Serbian tandem, which had won the Chennai Open in January this year, yesterday lost to the Swedish-Romanian pair of Robert Lindstedt and Horia Tecau, 4-6, 5-7.<br/><br/>Meanwhile in the Men's Singles section, top seeds like Novak Djokovic, Roger Federer and Andy Murray have also advanced into the quarterfinals. Serbia's World Numbr One Novak Djokovic defeated Sergiy Stakhovsky of Ukraine, 7-6, 6-3, while Swiss Roger Federer beat Felicino Lopez of Spain, 7-5, 6-3. Briton Andy Murray outlplayed Marco Chiudinelli of Switzerland to win his pre-quarterfinal match in straight sets, 6-3, 6-4.