The Nigerian striker finally found the net six minutes later after he scored from a goalmouth melee to stun the hapless ONGC defenders.

The ONGC defence crumbled under relentless attack of Chidi and Barreto and their desperation was apparent after Barretto was brought down in the box in the 39th minute. The Brazilian shockingly squandered the opportunity as ONGC goalkeeper Billy Fung Nazary made a timely dive to save the powerless shot.

Four minutes later, Barreto made up for the mistake and unleashed his powerful right-footer that crashed into the net as Mohun Bagan went into the break with a 3-0 lead.

ONGC failed to rejuvenate them even after the breather barring a slim chance when Lalsangzuala's well-directed shot was saved by goalkeeper Sangram Mukherjee.

In the last 10 minutes, Mohun Bagan were all over and Chidi completed his brace in the 82nd minute from Shanta Kumar's precise pass. Surkumar struck again in the dying minutes with a long ranger to complete the tally.