Rohan Bopanna and Aisam-ul-haq-Qureshi erased a one-set deficit against Janko Tipsaveric and Viktor Troicki to storm into the semifinals of the St. Petersburg Open.

The second seed Indo-pak pair came from behind to eke out a 3-6 7-6(4) 10-3 win over their unseeded rival in the quarter-finals, yesterday.