The 17-year-old Vaishnavi from Hyderabad encountered a strong challenge from her city mate, who is four years younger, before winning 3-6, 6-2, 6-4.
Meanwhile, Taipei’s third seed Chih-Chun Tang warded off a spirited challenge from unseeded Indian Gravit Batra to claim the boy’s singles title. Tang registered a 6-2, 6-7(4) 7-5 victory in a little over three hours.
Other results: (Girls’ doubles) Yekaterina Gubanova-Hana Mortagy bt Snehadevi Reddy-Dhruthi Venugopal 6-4, 4-6, 10-7; (Boys’ doubles) Sagadat Ayap-Alexey Nesterov bt Sahil Deshmukh-Goran Markovic 7-5, 4-6, 10-6.
Photos: Ajay Devgn, Parineeti, Tabu at 'Golmaal Again' trailer launch
Photos: Dipika Pallikal Karthik oozes oomph in bikinis and sarees
Photos: Kareena Kapoor Khan's grand birthday bash
Photos: 'Dangal' girls Sanya Malhotra, Fatima Sana Shaikh's dinner outing
Photos: Salman Khan, Daisy Shah spotted at the Mumbai airport