The tournament is being organised by Bandra Gymkhana.
Eqbal from West Bengal was no match for fifth-seeded Fahad Mohammed, who maintained his aggressive wining momentum and breezed to a straight sets win.
Mohammed was robust and dominant throughout as he knocked the fight out of Eqbal, coasting to a 6-2, 6-1 win.
Khan stunned Dalmia with a 6-2, 2-6, 6-0 win.
Mohammed, the only seed remaining in the competition, will take on qualifier Vaidik Munshaw of Gujarat in Fridays semi-finals. Munshaw sidelined K. Srinivas of Andhra Pradesh 6-4, 6-0 in the quarter-finals.
Results Mens singles (quarter-finals): 5-Mohammed Fahad (TN) bt 1-Ishaque Eqbal (WB) 6-2, 6-1; Vaidik Munshaw (GJ) bt K Srinivas (AP) 6-4, 6-0; Shahbaaz Khan (MH) bt 4-Shivam Dalmia (DL) 6-2, 2-6, 6-0; Atharva Sharma (MH) bt Rohan Bhatia (MH) 2-6, 6-2, 6-1.
Mens Doubles (2nd round): Ishaque Eqbal (WB)/Yash Yadav (MP) bt Tarun Karra (TS)/Arthav Neema (MP) 5-2(retd hurt); Shivam Dalmia (DL)/Fahad Mohammed (TN) bt Mohit Bhardwaj (DL)/Sagar Ahuja (MH) 6-4, 6-2.
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