Nikshep demolished Saurav Kalkal 6-1 6-1 while Solanki defeated Utsav Patel 6-3 6-4 at the RK Khanna Tennis stadium.
Karnataka boy Nikshep was dominating as Saurav could manage to hold his serve only twice in the entire match and went down to his fancied rival without much fight.
In other matches, third seed Paramveer Singh Bajwa beat Sivadeep Kosaraju 6-4 6-2 while fifth seed Gokul Suresh got the better of Sidhant Bhantia 6-1 6-2.
In the boys' 14 competition, top seed Sumit Pal Singh survived a tough battle against S. Manish. The Jammu Kashmir boy was broken in the third game but broke back in the next to draw level.
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Just when it seemed that he set was heading into a tie-breaker, Manish broke Sumit in the ninth game and then served out the set to win the first set 6-4.
Second seed Pariskshit Somani had an easy outing and demolished Pratyush Chhotray 6-0, 6-0. For eighth seed Mritunjay Badola it was curtains after the Uttarakhand lad lost to Naitholin Golmei 7-5, 7-5.
In the girls' 16, top seed Akshara Iska got the better of Yubrani Banerjee 6-1 6-2 to move to the pre-quarter-finals.