The unseeded Indo-American pair took out Australia's Anastasia Rodionova and Zimbabwe's Cara Black 6-2 7-5 in the semifinals of the USD 2,000,000 hard court event.
Sania and Bethanie had to work hard for points as Black and Rodionova fought well in the contest, lasting in one hour and 20 minutes.
Sania and Bethanie now await winner of the other semifinal between the pairs of Nuria Llagostera Vives/Jie Zheng and Nadia Petrova/ Katarina Srebotnik.