Sandeepti Singh Rao sustained her success story as she sailed past fifth seed Tamara Curovic of Serbia in the pre-quarterfinals of the $15,000 ITF women’s tennis tournament at the Tennis Project, Baliawas, on Thursday. The 19-year-old Sandeepti who had beaten the Serb last week on clay in Jhajjar, after saving three match points in the semifinals, was a bit disappointed …