Hau arrived late in a challenge and caught Doan Ngoc Tan's right leg with his studs. Referee Ngo Duy Lan initially issued a yellow card before changing it to red after reviewing the video. Tan could not continue and was substituted; the report did not confirm the extent of any injury.
Despite being reduced to ten players, Cong An Ha Noi maintained their defensive shape. Stefan Mauk scored the only goal in the fourth minute of stoppage time, heading in a delivery from Le Van Do.
The victory moved Cong An Ha Noi to six points after two V.League rounds and extended their strong start across competitions. Hau's dismissal nevertheless became one of the main talking points of the derby.