Mushrath recorded her second upset win in a row having accounted for her elder sister and third seed Mubashira yesterday.
Top seed Riya Uboveja of Maharashtra ended the run of local girl Bela Tamhankar 6-2 6-1 while another state player Gargi Pawar put an end to wildcard Adithi Are's aspirations winning 6-3 6-3.
Sixth seeded Malikaa Marathe faced heavy weather before edging out Smriti Bhasin 6-1 5-7 7-6(2) to complete the girls semi lineup.
In an all-Maharashtra contest, qualifier Aditya Balsekar survived a match point to edge past local boy Sarvesh Biramane 5-7 7-6(4) 6-0 in the longest match of the day.