Sabhyata Nihalani dumped top seed Sathwika Sama 6-0 7-5 in the Girls Under-16 quarter-finals while Shivani Ingle lost 6-4, 4-6, 1-6 to Akanksha Bhan.
The other two girls to win their quarter-finals were Mahak Jain and Prinkle Singh.
In Boys' Under-16, for the first time top seed Parikshit Somani was tested as he prevailed over Sivadeep Kosaraju 6-4 7-5 to make the semis.
Adil Kalyanpur, the second seed, walked through to a smooth 6-4 6-2 win against Yugal Bansal. Third and Fourth seed Siidhanth Bhatia and Nitin Sinha also booked their last four berths.
In Boys' Under-14, second seed Sacchitt Sharrma comfortably moved into the semi-finals by defeating Aaryan Mehul Zaveri 6-2, 6-3 while fifth seed Shashank Teertha whipped Rhythm Malhotra 6-1, 6-1. Mann Maulik Shah and Shashikant Rajput also entered into the semi-finals.