Dinh Bac scored on 25 minutes, but rhythm is what Kim Sang Sik must fix

On 25 minutes, Williams Minh Hoang collected Thanh Long's through ball, accelerated down the right flank and whipped in a low cross. The ball struck a Philippine defender's back and changed direction in an instant. Dinh Bac, the only player in the box who read the new trajectory, reacted first and fired past Falkesgaard. The stadium erupted. In my notebook, the only entry at that moment was a single figure: "25". Then I added four more words: "Vietnam dropped deep."

Six minutes after the goal, Vietnam's shape had collapsed almost entirely. Adou Minh and Viet Anh retreated to the edge of their own penalty area, both wide midfielders tucked inside, and the distance between the front line and the back line stretched beyond thirty metres. From that point on, the Philippines held more of the ball, worked it wide, and created enough chances that they should have equalised. The crossbar saved Vietnam once. Patrik Le Giang saved them many more times than that.

Incheon taught me to watch a match with my ears before my eyes. I heard the shift before the scoreboard had reason to mention it: footsteps thinning on the terraces, the away side's calls growing louder, the sound of the ball bouncing closer, as though the match had moved permanently into Vietnam's half.

Three points, and a long run

Vietnam won, took all three points from the opening fixture, and extended their unbeaten run to 27 matches. Every coach wants that line on his record.

Kim Sang Sik, however, left the pitch with a longer to-do list than celebration sheet. He is working under strained conditions: a prolonged calendar, senior players carrying heavy minutes, and injuries that forced him to re-draw both defensive and attacking lines. Xuan Son left the tournament early through injury, removing from the spine of the team the striker around whom the entire attacking structure had been designed.

In those circumstances, the Philippines match carried two questions at once. Could Vietnam win. And did Vietnam have anyone to replace a familiar group of names. The first answer was yes. The second was more complicated, and far more interesting.

How does Vietnam control a game after taking the lead?

There is an old principle I still check whenever I watch a team score early: sides do not lose control because they drop deep, they lose control because they drop deep without knowing who will carry the counter-attack.

That is precisely what happened to Vietnam between the 25th and 90th minutes. The low block sealed the space in front of the penalty area, but it also pulled every player out of transition. When the back line retreats, the midfield must retreat to hold its distances. When the midfield retreats, only one or two players remain ahead of the ball. Clearances find no target. The ball comes straight back, and the loop begins again.

The consequence does not show up in the scoreline, it shows up in the number of times a team absorbs pressure without an exit. The Philippines were not clinical, and that was Vietnam's fortune. The volume of chances they created was not fortune; it was the direct result of how Vietnam chose to play once ahead.

Based on my experience tracking matches, a low block only works when it is paired with at least two forwards capable of holding the ball for three seconds. Vietnam did not have two such players on the night, and that is why the Philippines could press continuously without fear of punishment.

Three new faces, three different signals

The real bright spot lay elsewhere: three players making their Vietnam debuts.

Adou Minh went straight into the starting defence alongside Viet Anh and Xuan Manh. The CAHN centre-back read situations well, stayed composed under high balls, and was strong in duels. He contributed substantially to the clean sheet, and a centre-back can only do that through consistency rather than a single flash of brilliance.

Khoa Ngo came on in the 70th minute and immediately gave Vietnam another attacking outlet. That is the kind of change I rate highly in a coach patching together a squad: an option different enough to force the opponent to recalculate, yet safe enough not to break the structure. Kim had leaned on a familiar group for a long time, and every trustworthy new option carries its own value.

Williams Minh Hoang made the most decisive attacking contribution. He collected Thanh Long's pass, accelerated down the right, and delivered the cross that produced the only goal, albeit with a deflection. What matters is that the cross was not accidental: it was the work of a player who read the space before he received the ball.

Few expected Kim to hand a starting place in the opening match to a 19-year-old. Hoang immediately justified the confidence: intelligent movement, clean technique, an ability to create, and a quicker adaptation to the team's style than his age should allow.

Standing 1.90 metres, Hoang was deployed on the right wing rather than as a central striker. That was a calculated choice, with Xuan Son occupying the central role. Xuan Son's early exit through injury may now expand Hoang's role, and the CA TP.HCM forward could be asked to take on more scoring responsibility alongside Dinh Bac.

Born in 2026, Hoang has risen quickly: half a season to establish himself at club level, a few training sessions to impress Kim and earn a start. Of Vietnamese and English heritage, he plays with a European edge: direct, efficient, few wasted touches, physically imposing yet nimble enough to operate in tight spaces. He carries the attributes of a future first-choice striker: pace, technique, strength, hold-up play and finishing.

The blind spot the goal concealed

Most reports that night will give the goal the bulk of their space. I think that reads the wrong centre of gravity.

The deflection made the goal partly fortunate. But stopping at the admission of luck misses the larger problem: a team with deep tournament ambitions cannot spend the remaining 65 minutes in that passive a posture. Against Thailand, or any side more clinical than the Philippines, Vietnam will pay for the moments that produced the crossbar escape and the saves that demanded Le Giang's very best.

The second contrarian point matters more for the near future. Starting Hoang is a good signal, but turning him into the direct replacement for Xuan Son is a leap taken too quickly. He is 19. His body is not fully matured. The five-substitution rule gives coaches more options, but it also turns the final 20 minutes into a war of attrition, pushing hardened players into repeated high-speed duels. Placing a 19-year-old into that furnace, match after match, is the fastest way to lose a talent.

I count every stride on the training ground, but what I remember is the coach's sigh. Those sighs usually attach themselves to decisions made too quickly.

The most sensible use of Hoang in the coming games is to keep him on the right, where he has room to accelerate, a touchline as an anchor, and fewer back-to-back duels. The central role can come, but it should come on a schedule, not out of urgency.

What to watch against Thailand

One match is not enough to conclude whether Adou Minh, Khoa Ngo and Williams Minh Hoang can sustain the form and confidence of their debuts. Their performances nevertheless delivered options Kim has hunted for over a long period, while working around a largely fixed group of personnel.

Another start for Hoang against Thailand would come as little surprise. Whether he can genuinely fill Xuan Son's role remains open, but the potential to become a long-term option is now visible.

Vietnam won an opening match that was far from complete. The rhythm of that night belonged to a team that took the lead and then pushed itself into survival mode. People record goals; I record rhythm. Neither ever repeats itself, and that is exactly why both deserve to be taken apart before the next match begins.