The Cong Viettel beat Dong Nai FC 2-0: Lessons from crosses and two red cards

On the evening of September 4, at Thong Nhat Stadium, a Group Stage match of the 2026 National Cup concluded with the name Nham Manh Dung mentioned not for a goal or a pass, but for a punch. It was the 79th minute, when the forward of The Cong Viettel rushed into a teammate from Dong Nai FC in a ball-less situation. Referee Do Khanh Nam — after consulting VAR — showed a straight red card. The visitors from V.League 1 were down a man, but how they exploited the numerical advantage was what mattered.

Earlier, Jovic of Dong Nai had already left the pitch at the 71st minute with a red card for serious foul play. Both teams played with 10 men for over 20 minutes, but The Cong Viettel utilized that time far more effectively. The second goal came from a corner kick in the 79th minute, just before Nham Manh Dung received his red card. That scenario revealed a reality: whichever team better exploits the extra man wins.

But this match was not just about red cards. It was also a reality check for a player once expected to be the number one star of Vietnamese football: Nguyen Cong Phuong.

Substitutions that shaped the match

Around the 60th minute, both teams made substitutions simultaneously. The Cong Viettel brought in Danh Trung to replace a central midfielder. Dong Nai FC — a V.League 2 club — brought on Cong Phuong. There were expectations that this would be Phuong's moment, a player who was once the symbol of Vietnam's youth development, once compared to top Asian attacking players.

Forty-five seconds after stepping onto the pitch, Danh Trung created a goal. He delivered a cross from the right flank, finding a teammate inside the penalty box. The Cong Viettel led 1-0. Cong Phuong, meanwhile, had no notable movement in the remaining 30 minutes.

This is not the first time I have observed this phenomenon. After 10 years of following Vietnamese football, I recognize a pattern: the difference between a player still at their peak and one on the decline shows most clearly in the moments after coming on as a substitute. A player still in form typically makes an impact within the first 5 minutes. A player who has lost form fades into the opponent's defense as if they were never there.

Danh Trung, born in 2026, is not a familiar name to neutral fans. He has no announced sponsorship contracts, has never been called up to the national team, and has never caught the attention of top agents. But in the 30 minutes at Thong Nhat Stadium on the evening of September 4, he completed a task that a player valued 10 times higher could not. That is football's old definition: whoever scores goals, whoever creates goals, that person matters.

Numerical advantage and how to exploit it

The second goal of The Cong Viettel came from a set piece. After Jovic received his red card in the 71st minute, Dong Nai played with 10 men. The team of Coach Dang Tran Ching — despite being in the First Division — tried to maintain a tight defense in the first 8 minutes after the red card. But the pressure from the V.League 1 visitors gradually eroded the defensive structure.

The corner kick in the 79th minute was not luck. It was the result of a sequence of 5 consecutive attacks that The Cong Viettel launched during the opponent's 10-man period. I reviewed the footage and noticed: the visitors moved into the penalty box in an organized manner, with at least 3 players occupying positions in the 6-meter zone before the ball was struck. This is a sign of tactical preparation from the coaching staff.

Conversely, Dong Nai after losing a man seemed to have no contingency plan. No personnel adjustment, no intention to drop deeper into defense. The team — with limited resources typical of the First Division — appeared to accept defeat the moment Jovic left the pitch.

A notable detail: the second goal was scored in the 79th minute, only 8 minutes after Dong Nai went down to 10 men. The average time for teams to score after an opponent is reduced to 10 men in V.League 1 is approximately 12 minutes. The Cong Viettel was faster than this average. This shows they were ready to exploit the advantage.

Two red cards and the discipline story

Referee Do Khanh Nam consulted VAR twice in this match. Both times resulted in straight red cards. For Jovic, it was a tackle from behind with intensity deemed dangerous. For Nham Manh Dung, it was a punch to the opponent's face in a ball-less situation.

Most post-match commentary focused on Nham Manh Dung's incident. A forward who was leading 2-0, in a game that was already settled, lost emotional control to the point of violent misconduct. This is not a technical issue. This is a psychological one.

I have followed many matches in youth leagues and noticed: young players often lose control when they feel treated unfairly or when the match is already decided. Nham Manh Dung is 24 — at the peak of his physical condition — but still lacks enough experience to stay composed in every situation. This could be an individual error, but it also partly reflects the club's psychological training work.

According to VFF regulations, a straight red card for violent conduct can lead to a suspension of 3 to 6 matches. In the central scenario, Nham Manh Dung will miss at least 3 matches. For The Cong Viettel, this is a significant loss as he is one of their main attacking options.

Nguyen Cong Phuong: A comeback not as expected

Nguyen Cong Phuong, born in 2026, was once Vietnam's best young player in 2026, was trusted by coach Park Hang-seo at the national team, and once played for Incheon United in the K-League. On the evening of September 4, he came on in the 60th minute for Dong Nai FC — a V.League 2 club — and played 30 minutes leaving virtually no imprint.

This was not the first time Cong Phuong underperformed. Since leaving Hoang Anh Gia Lai in 2026, he has moved to HAGL, then Dong Nai. Each step down a league level, each time expected to burst onto the scene at his new team, but the reality has been different.

I do not want to turn this article into a verdict on Cong Phuong. Football is a complex sport where performance depends on dozens of factors: fitness, psychology, opportunity, teammates, coach. One match does not define a career. But data from recent matches shows a trend: Cong Phuong is increasingly far from the image of a player who can change a game.

A small but important detail: in the 30 minutes Cong Phuong was on the pitch, Dong Nai had no notable attacks toward the opponent's goal. The team played with 10 men from the 71st minute, but Cong Phuong — expected to make a difference — almost disappeared from the match. He had no shots, no key passes, no successful dribbles.

Dong Nai: A vision beyond one loss

Dong Nai FC belongs to V.League 2, a league with limited financial resources and uneven squad quality. Their signing of Cong Phuong — even as he is not at his peak — shows a clear strategy: leveraging a familiar name to attract fans and sponsors.

This is the reality of lower-tier football in Vietnam. V.League 2 clubs cannot compete professionally with V.League 1, but they can create commercial value from recognizable names. Every match where Cong Phuong starts or comes on attracts media attention, thereby increasing ticket sales, broadcasting rights, and sponsor attraction.

Professionally, Dong Nai on the evening of September 4 played a more organized match than typical V.League 2 teams. They did not defend passively but tried pressing from distance in the early minutes. The first goal conceded came from individual error rather than system failure. After going down to 10 men, the team still tried to play — though the result was not as hoped.

Jovic was a notable foreign player. He scored for Dong Nai in the previous round and is one of the rare foreign players in the First Division capable of making a difference. His red card in the 71st minute affects not only this match but upcoming fixtures. If Jovic receives a 3-match ban — the typical punishment for a straight red card — Dong Nai will lose their attacking focal point during an important period.

The Cong Viettel: Squad depth tested

The Cong Viettel represents the military in V.League 1. The club is famous for its youth academy, which has produced many talented players like Quang Hai, Thanh Chung. The match on the evening of September 4 showed another aspect: squad depth.

Danh Trung, who came on as a substitute and immediately created a goal, is proof that the club has quality backup options. Nham Manh Dung — despite receiving a red card — was also brought in from the bench. The coach's decision to bring these two players on at a crucial moment shows he was testing and evaluating his squad.

A 2-0 victory over a V.League 2 team was an expected result. But how The Cong Viettel won — especially by effectively utilizing the numerical advantage — shows the team had good tactical preparation. The goal from a corner kick, after the opponent went down a man, was not accidental but the result of organized movement into the penalty box.

However, Nham Manh Dung's red card is a negative. In professional football, discipline is as important as technique. A team aiming to compete at the top cannot lose players due to unnecessary actions. The Cong Viettel needs to review disciplinary education for players, especially young ones in the development phase of their careers.

What this match left behind

The match of The Cong Viettel beating Dong Nai FC 2-0 was not a decisive match in terms of group standings or rankings. But it provided important data for both sides.

For The Cong Viettel: squad depth was tested, but the discipline issue needs to be addressed. If Nham Manh Dung is suspended for multiple matches, the team will need worthy replacements. Danh Trung has shown he can be a reliable option.

For Dong Nai FC: Jovic's red card is a major loss. The team needs to prepare for the scenario of missing their foreign striker in the coming period. Regarding Cong Phuong, this was another disappointing match in a difficult period for him. No one can conclude about a player's career from just one match, but the trend is becoming increasingly clear.

In terms of refereeing: the match showed VAR is being used effectively at lower-tier competitions in Vietnam. Both red card decisions were carefully reviewed, minimizing controversy. This is a positive signal for Vietnamese football development.

The match ended, both teams returned to their own equations. The Cong Viettel continues their National Cup journey with squad depth proven. Dong Nai continues building the team with limited resources, hoping for the attention that Cong Phuong brings. And Nham Manh Dung — waiting for punishment from VFF, waiting for redemption opportunities.

Football is never just 90 minutes on the pitch. It is stories about people, about decisions, about moments defined by both success and failure. And the match on the evening of September 4 — with all it contained — is a typical example.