The derby at Hang Day was tightly contested. The Cong Viettel's disciplined defending restricted space, leaving Cong An Ha Noi struggling to turn possession into a breakthrough.

The visitors then lost Doan Van Hau to a red card following a foul on Doan Ngoc Tan. The Cong Viettel pushed forward with the numerical advantage but could not convert their increased pressure into a goal.

In the fourth minute of added time, Van Do delivered the ball for Mauk to head home the winner. The late combination preserved Cong An Ha Noi's perfect league start, while The Cong Viettel missed an opportunity to take points from a fellow title contender.