The unseeded Indo-Romanian pair shocked their fifth seed rivals 6-3, 1-6, 10-6 in the second round of the USD 2,000,000 hard court event.
They had earlier beaten local pair of Melanie Oudin and Jamie Hampton 6-4, 7-6 in the opening round.
They will next take on the winners of the match between Kveta Peschke/ Katarina Srebotnik and Maria Kirilenko/Victoria Azarenka.
Sania had failed to make the singles main draw after losing the first round of the qualifying event to 16th seed Serbian Bojana Jovanovski.
Published 12 August 2010, 10:34 IST