TORONTO (Agencies) - Sania Mirza and her Russian partner Elena Vesnina made a shock first round exit in the WTA Rogers Cup tennis tournament after losing to the Italian pair of Sara Errani and Roberta Vinci in the women's doubles event on Thursday. The fifth-seeded Indo-Russian pair squandered a set lead to eventually go down 6-2, 0-6, 7-10 to their Italian opponents. After winning the first set comfortably, Sania and Vesnina failed to maintain the momentum and failed to pocket even a single game to lose the next set 0-6.