India's Sania Mirza and Rohan Bopanna, with their respective partners, have advanced into the pre-quarterfinals of the Miami Open Tennis tournament.In the Women's Doubles opening round, the seventh seeded Indo-American duo of Sania Mirza and Bethanie-Mattek Sands defeated the Czech-American combination of Eva Birnerova and Varvara Lepchenko, 7-5, 6-3.In the Men's Doubles first round, Rohan Bopanna and his American partner Rajeev Ram beat the American-Aussie team of Eric Butorac and Paul Hanley, 7-6, 6-4. Leander Paes and Mahesh Bhupathi, along with their team-mates, have already made it to the Men's Doubles last-16 stage.Meanwhile, World Number One Serena Williams of the United States, Agnieszka Radwanska of Poland and China's Na Li have made it to the Women's Singles pre-quarterfinals.In the Men's Singles, second seeded Briton Andy Murray, Tomas Berdych of the Czech Republic and Frenchman Jo-Wilfried Tsonga cruised into the third round.