Playing her first live match, Sania and Prarthana beat Maria Erakovic and Abigail Guthrie 7-5 6-1 to win and put India atop Pool D.
Prarthana had put India ahead by winning the first singles against Dianne Holland 6-1 6-4.
However, Erakovic, who is world number 32 in doubles, brought her side back in the tie with 6-1 6-2 win over Ankita Raina.
The doubles became crucial and Sania, used all her experience to win it for India.