Sania and her Australian partner Alicia Molik, seeded sixth, won a two-hour battle against the unseeded Greco-German pair of Eleni Daniilidou and Jasmin Woehr 6-3 4-6 6-4 to advance to the second round.

Bopanna, on the other hand, teamed up with American-Indian Rajeev Ram to oust British-American duo of James Auckland and Sam Querrey 6-1 7-6 (4).

Bopanna and Ram will next be up against the winners of match between fifth seeded Indian-Australian team of Leander Paes and Paul Hanley and unseeded Luis Horna of Peru and Austrian Stefan Koubek.

Sania and Molik, meanwhile, will take on Russians Nadia Petrova and Elena Vesnina, who breezed past local favourites Sophie Ferguson and Trudi Musgrave 6-3 6-4.

Sania, who on Tuesday won her opening round singles encounter, and Molik were tested hard in the engrossing first-round clash.

The sixth seeds had no trouble in pocketing the opening set in just over half an hour, capitalising on their opponents poor serve and several unforced errors.

However, Sania and Molik were in for a shock in the second set as Daniilidou and Woehr broke them twice in the 40-minute contest to draw even and take the match into a third set.

The decider was also an even battle but Sania and Molik came out trumps after breaking their rivals thrice out of the six chances they got besides being slightly ahead in the overall winners tally.

In contrast, Bopanna and Ram were in fine form as they held serve and broke Auckland and Querrey twice to take the opening set in just 25 minutes.