The Indian ace beat Australia's Casey Dell'Acqua 6-4, 3-6, 6-4 in the second round.
They were beaten in straight sets by Italy's Maria Elena Camerin and Gisela Dulko of Argentina.
The Indian, who was out of action since playing in the Fed Cup in Seoul, dropped three places in the latest rankings
The Indian went down 4-6, 4-6 to eighth-seeded Flavia Pennetta in the Japan Open quarter-final.