The Army-ONGC match saw a battle for supremacy and the two teams go on the offensive from the word go.
Stung by the reverse and trailing 1-3, ONGC stepped up pressure and mounted a series of attacks on the Army citadel.
Sumit Kumar scored in the 61st minute to give some hope for ONGC.
The Army defence held firm in the face of sustained pressure from the ONGC forward line to pull off a victory, which has ensured a semi-final berth.
The Central Secretariat, which impressed in a draw in the opening match against ONGC, scored once in each half to put it across the Mumbai team.
Meanwhile, the match between CHA and Bengaluru HA saw the local side bounce back from 0-2 down at half-time to secure a draw.
The Bengaluru team scored in the 14th and 35th minute through M Rajendra and M B Cariappa.
Chennai stepped up in the second half as Manoj and Veera Tamizhan scored to help eke out a point.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)