Australian forward David Williams struck a stoppage-time goal (90+1) coming in as substitute to hand ATK Mohun Bagan a dramatic 1-0 win over Chennaiyin FC in an ISL VII at the Jawaharlal Nehru Stadium here on Thursday.

After struggling to find its shooting boots for the entire regulation time, ATK Mohun Bagan finally found the goal with Williams soaring high to create space and unleashing his powerful header.

There was high drama in the dying minutes as Williams, who came in as a substitute in place of Carl McHugh in the 67th minute, scored from a Javier Hernandez’s perfect corner.

The Calcutta giants nearly conceded an equaliser moments later but Tiri made a goalline match-saving clearance to keep the lead intact and take them two points shy of leaders Mumbai City FC (26 points).