Vietnamese Badminton and Its Data Blank: What Remains After Every Rally

The rally lasted 41 shots. I counted, because I was sitting in the third row, roughly twelve metres from the net, with nothing but a small notebook in my hand. Around me, nobody was counting. The electronic board hanging overhead showed the score; it did not show the rally length. When the shuttle landed, I turned to three people: a coach standing near the sideline, a line judge, and the player who had just lost that rally. Three different answers. One said twenty shots, maybe. Another said thirty-something. The player wiped his sweat and smiled: it was long, I can't remember.

This story is not meant to assign blame to anyone. It simply exposes a blank space: in a sport where every rally is a chain of decisions lasting from a few seconds to a few dozen seconds, we are watching through memory.

Based on my experience following matches over more than eighteen years, from youth tournaments at Phu Tho Stadium to group-stage matches at an Olympic Games, one pattern keeps repeating: Vietnamese people watch badminton very well, but we record very little. We remember the brilliant rally. We do not remember how many shots that brilliant rally lasted, what trajectory the shuttle took, or at which shot the player began to change his footwork.

A stadium is the best keeper of secrets, but a fall is the thing that tells everything.

What makes this blank space a problem for an entire badminton nation

Before going deeper, the context needs to be rebuilt clearly. Professional badminton around the world operates within a tiered tournament system run by the Badminton World Federation, known as the BWF. The highest tier is the Super 1000 group, including major events such as the All England, China Open, Indonesia Open and Malaysia Open. Below that sit Super 750, Super 500, Super 300 and Super 100. Lower still are the International Challenge, International Series and Future Series. Each tier carries a different ranking-points value, and that points system decides Olympic qualification, World Championships entry, and seeding order at every tournament.

At events from Super 500 upward, organisers usually deploy the Hawk-Eye Instant Review System for line calls. This system does more than settle disputes with umpires. It unintentionally creates a layer of data: every review is a moment when the coordinates of a landing point are recorded. Combined with broadcasters' statistical software and match data published by the BWF, fans in countries with strong badminton traditions can look up very specific things: average rally length, points won by smash, unforced-error rates, average duration of each game.

Vietnam has one tournament inside the official BWF World Tour system: the Vietnam Open, part of the Super 100 tier, held annually in Ho Chi Minh City. There is also the Vietnam International Challenge and a handful of International Series events. The rest of domestic badminton life takes place in venues that differ radically in terms of data infrastructure: the national championships, the national top-racket tournament, youth events, provincial open tournaments, and hundreds of training sessions every day in halls from Hanoi, Bac Giang, Da Nang and Ho Chi Minh City to Can Tho, Binh Duong and Lam Dong.

In those venues, the only thing systematically recorded is the score. The score is accurate data, but it is the data of outcome, not the data of process. And in badminton, process is what decides the outcome the next time around.

I once sat in a technical meeting after a domestic tournament, listening to a coaching staff dissect a defeat. The session lasted nearly two hours. What was used for the analysis was: a video clip filmed on a phone from the stands, the memories of two coaches, and the player's own feelings. Nobody had the average rally length of the two games. Nobody knew how many points the player had lost because a short serve was attacked on the return. The meeting reached a conclusion that was emotionally correct and technically vague: you need to stay calmer.

That is where this article begins.

Five layers of a rally, and the layer we leave empty

A singles rally, viewed through the lens of data, can be split into five layers.

The first layer is the outcome layer: who won the point, how, and at what score. This is the only layer that domestic record-keeping covers almost completely.

The second layer is the structural layer: how many shots the rally lasted, what kind of serve started it, at which shot the rally was resolved, and which side was the one actively finishing it. This layer is almost entirely empty at domestic tournaments.

The third layer is the spatial layer: how many metres a player covered in a game, what proportion of time was spent in the rear court, and which zones on the court the decisive shuttles landed in. This layer exists only at tournaments equipped with tracking cameras, which is a very small share of the calendar Vietnamese players actually compete in.

The fourth layer is the physiological layer: heart rate, energy expenditure, recovery time between points, signs of accumulated fatigue across games. This layer is barely measured anywhere in badminton, including internationally, apart from a few scattered academic studies.

The fifth layer is the psychological and contextual layer: what state the player was in, what pressure came from the stands, what was going through his head at shot thirty. This layer cannot be measured by a machine, but it exists, and in badminton it carries a far greater weight than any statistical table admits.

In a rally, tactics are the shell; the person inside is the thing worth dissecting.

The problem for Vietnamese badminton lies here: we are trying to analyse the fifth layer with the tools of the first. We talk about composure, about competitive psychology, about the ability to withstand pressure, while we do not even have second-layer data to verify what that pressure actually looks like on court.

What video does not preserve

There is an argument I hear often: every phone can now record video, so why bother with laborious measurement, just watch the footage and you will see everything.

That argument is half right. Video preserves images. It does not preserve structure.

When you rewatch a 40-shot rally on screen, your eye is pulled toward the dramatic moments: the decisive smash, the spectacular retrieval, the fall. You do not see that during the first 32 shots, the winning player was repeatedly pushing the shuttle to the left and right rear corners at an almost fixed rhythm, and that at shot 33 the shuttle's trajectory changed by roughly twenty centimetres — enough to break the footwork rhythm that had accumulated over the previous half minute.

To see that, you have to count. You have to log every shot, the receiving position, the type of return. This is boring, repetitive work, and nobody in Vietnam pays for it.

In several badminton nations in the region, this is done professionally. National teams have dedicated analysts, event-tagging software, and head-to-head databases built up over years. Every time they meet an opponent again, they have a file on that opponent's serving habits at 18-18, on their preferred attacking direction when trailing, on how many minutes into the third game they typically fade.

That is a form of advantage that never appears on a results board. It is never mentioned in news bulletins. But it exists, and it partly explains why some matches feel as though one side already knows what is about to happen.

I think back to my own story. In 2026, at twenty-five, I was a rookie field reporter for a digital sports channel in Da Nang, sent to cover a regional multi-sport games. In the women's 400 metres hurdles final, I mispronounced the name of athlete Nguyen Thi Huyen three times in a row during live commentary. Viewers on the fan page reacted furiously. That night I sat in my room, rewinding the footage over and over, and realised I did not just need to memorise names. I needed to understand the story behind every stride, every breath, every metre of track.

That lesson applies even more strongly to badminton. The fall at that Games did not make me afraid of failure; it made me used to standing up in silence.

And from that point on, I began keeping a separate notebook for each athlete I followed. Not a record of results. A record of circumstances, of journeys, of the things a scoreboard never shows.

Lessons from the one who went furthest

Nguyen Tien Minh was born on 12 February 2026 in Ho Chi Minh City. He is the most successful badminton player in Vietnamese history to date: a former world number five, a bronze medallist at the 2026 World Championships in Guangzhou, and the first Vietnamese player ever to stand on the podium at that event. He competed at four consecutive Olympic Games, from Beijing 2026 and London 2026 to Rio 2026 and Tokyo 2026, held in 2026.

What matters here is not those figures. What matters is how he sustained a career across nearly two decades, in a sport where reaction speed and recovery capacity decline noticeably after thirty.

I have put this question to many people in the sport: how. The most common answer is training discipline. The second is a strong technical foundation. Both are true, and both are surface answers.

The real answer lies in something harder to measure: he knew himself. He knew at which shot he should change the tempo of the match. He knew when to extend a rally and when to finish early. He knew which matches to empty the tank for and which to conserve his legs for the next day.

That kind of knowledge does not come from external data. It comes from an internal data system, built through thousands of matches and tens of thousands of training hours.

There is a paradox worth pondering here: the most successful player we have produced is the one who built his own personal database, while the entire national badminton system has no shared database to pass on to the next generation. His experience largely lives inside his head.

When a player like that retires, a library closes.

The next generation and the gap behind them

Nguyen Thuy Linh was born on 20 December 2026 in Phu Tho province, and has been the leading figure in Vietnamese women's badminton for several years. She competed at the Tokyo 2026 and Paris 2026 Olympic Games. Le Duc Phat, born in 2026, also appeared at Paris 2026 and went reasonably deep in the men's draw. Before them, Vu Thi Trang represented Vietnamese women's badminton at Rio 2026.

This is a generation with more resources than the previous one: more overseas training camps, earlier exposure to international tournaments, foreign coaches during certain periods, and support from both state budgets and corporate sponsorship.

But better conditions do not automatically translate into better data.

I once witnessed a situation that has stayed with me. After an international match in which a Vietnamese player lost narrowly in the third game, a coach told me the team had analysed the opponent very carefully. I asked: analysed based on what. The answer was: rewatching their last three matches on YouTube.

Three matches on YouTube. No rally-length data. No landing-zone statistics. No file on where that opponent serves when leading 19-17. No data on how long that opponent needs to recover after a long rally.

Meanwhile, on the other side of the net, there was quite possibly an analyst who had logged every single shot that Vietnamese player had played over the previous six months.

The gap at the elite level is usually not a gap in raw physical capacity. It is a gap in information.

Physicality, injury and the submerged part of the iceberg

There is another problem the data blank conceals: injury.

Badminton is a sport with a surprisingly high injury density for the casual viewer. Knees, ankles, shoulders, lower back, wrists. Movements such as repeated jumping smashes, sudden changes of direction at high speed, and lunging to retrieve shuttles near the floor create repetitive load on joints and tendons.

In developed badminton nations, there is data tracking training volume, weekly jump counts, and recovery indicators. In Vietnam, most of this is managed by feel: how do I feel today.

I do not dismiss feel. The feel of a professional athlete is a refined form of data, and sometimes it is more accurate than any device. But feel has one fatal weakness: it does not archive over time. Tomorrow, the player will not remember exactly how much they trained last week, how much they slept, or when the ankle pain began.

In 2026, while following the story of Christian Eriksen collapsing at Parken Stadium in Copenhagen, I fell into a professional crisis that lasted weeks. As someone who had always seen sport as a place of healing, I did not know what to write about an evening like that. After the tournament, I happened to meet a member of the Danish national team's medical staff at Copenhagen airport, and heard about the three-minute resuscitation protocol and how they looked into players' eyes to stay calm. From that I wrote a long piece about fragility, and stopped using flashy phrases about fighting spirit.

I mention this because it connects directly to Vietnamese badminton. If we have no injury data, we cannot know at what level a young athlete is accumulating risk. We only find out once the injury has already happened, and by then it is too late.

A snowstorm does not erase sound; it only teaches us to listen on a different frequency.

An athlete's body is the same. It is not silent. It simply speaks on a frequency we have not yet learned to hear.

Four reasons the blank space persists

Once the problem is understood, the next question is always: why has it not been done.

The first reason is staffing cost. A match-data recording system needs people. Not many: two people per court is enough to log rally length and point outcomes, three if you want positions and shot types as well. But two to three people per court, multiplied by courts, multiplied by competition days, is not a trivial line item for domestic tournament budgets.

The second reason is habit. We have analysed by feel for a very long time, and feel sometimes produces the right answer. In sport, a method that is right three times out of four is hard to displace, even when a better method exists.

The third reason is that there is nowhere to store it. Data only has value when it accumulates. A record of one match is meaningless. A record of a thousand matches over ten years is a national asset. Building that archive requires patience that outlasts the terms of the people making decisions.

The fourth reason, and perhaps the deepest, is that we have never clearly seen its value. Nobody in Vietnam has experienced the feeling of holding a detailed file on an opponent before a major match. Without knowing, you do not feel the absence.

The counter-view: when data becomes a trap

At this point I have to challenge myself.

One school of thought holds that Vietnamese badminton should follow the analytical model of leading badminton nations, invest in systems, hire specialists, and chase every metric the world currently uses.

I do not fully believe in that direction.

There are two reasons.

First, data is a tool for answering questions, not a tool for generating them. If we import a set of metrics from elsewhere without understanding why those metrics exist, we will end up with a stack of beautiful charts and no idea what to do with them. I have seen opponent-analysis reports running to dozens of pages in some sports, and after the match, the coach admitted he had not finished reading.

Second, and more importantly: the identity of Vietnamese badminton was built on improvisation, on unorthodox shot-making, on the ability to scramble out of disadvantageous situations. If we over-standardise, we may lose the only weapon that larger badminton nations do not have.

But this is where I want to be clear: preserving improvisation does not mean refusing to record. The two are not mutually exclusive. A player can have data on an opponent's tendencies and still produce a shot nobody anticipated at shot twenty.

People often frame this as a choice between intuition and analysis. That framing is wrong.

Intuition is fed by data. An artist who produces an unexpected shot does not do so because he knows nothing, but because he knows so much that he no longer needs to think.

The real problem for Vietnamese badminton is not that we lack data. It is that we lack the habit of asking specific questions. We ask: why did we lose. We do not yet ask: at which shot did the match turn, and why at exactly that shot.

I think back to 2026, when the entire calendar stalled because of the pandemic. I fell into a state of emptiness. As an introvert pursuing a career of meaning, I could not sit still with the meaningless stream of information on social media, but I also could not genuinely connect with colleagues through online meetings. There was a time my parents asked whether work was tiring, and I cried alone in my room because I did not know what meaning I still had when there was no sport to write about.

After nearly three weeks of self-isolation, I started writing a series about the history of regional derbies, set against how crowds generate psychological pressure. An article about the 2026 SEA Games men's football final between Vietnam and Thailand unexpectedly spread widely, because in it I dared to say that the applause of the stands is also a twelfth player with its own tactical system.

In 2026, I discovered that an empty stadium speaks in its own voice.

The lesson I took was not that crowds matter. The lesson was that some things only become visible when you sit down and listen from close enough.

A minimum system that could start tomorrow

If I were to propose one concrete thing, I would propose the smallest possible thing.

No software. No measuring equipment. Just one person, one notebook, and one consistent recording rule applied across domestic tournaments.

Record four things for every point: the rally length, which side won the point, how the rally ended (opponent error, winning smash, shuttle into open space, serving fault), and when in the game it happened.

Four data fields. With those four fields, after one season you can answer questions nobody can answer today: what percentage of rallies over thirty shots does this player win. At which stage of a game does that player lose the most points. Who has the highest average rally length in the tournament, and who ends points fastest.

Those answers would change coaching. They would change talent identification. And most importantly, they would change how a seventeen-year-old athlete understands himself.

I believe this because I have seen it in another sport. In athletics, where data is transparent to the point of near cruelty, every run can be reduced to time and distance. That transparency makes it impossible for people to deceive themselves. And that transparency, sometimes, is the cruellest thing of all to a human being.

I once watched a young athlete stare at the electronic board showing his time for so long that I thought he would cry. He did not cry. He turned away, walked one lap around the track, and began warming up again.

Data comforts no one. It simply states the facts correctly. And sometimes, stating the facts correctly is all an athlete needs.

What cannot be measured still needs to be told

There is one more thing I must add, otherwise this article contradicts itself.

Up to now I have argued for more record-keeping. But a sportswriter like me cannot live on data alone. If every rally is reduced to shot counts and percentages, we will have a very precise sport with very few viewers.

I remember that match in Russia in 2026, during the group stage of a World Cup, standing outside Kazan Stadium in cold rain, continuously analysing Iran's defence. I did my job very well. I had numbers, diagrams, arguments. In the second minute of stoppage time, when Mehdi Taremi scored the equaliser, my voice caught and I could not speak.

The following night, I walked alone around Lake Kazan, asking myself what kind of storyteller I wanted to be. The dry analyst, or the one who can still be moved.

The answer I chose was: both, but in a different order. Context, emotion, the atmosphere of the arena first. Numbers second, as a way of explaining why that emotion was so strong.

That is why I have written this article the way I have. I want a Vietnamese badminton scene with data, so that its stories can be told accurately. But I do not want data to become a substitute for the story.

A 41-shot rally can be recorded as the number 41. But the feeling of a nineteen-year-old player standing at shot forty, knowing he has chased this shuttle ten times and will have to chase it once more, cannot be contained by any number.

Our job is to hold on to both.

What would change if the blank space were filled

I want to sketch a concrete scenario, so that record-keeping stops being generic advice.

Imagine that next year's national badminton championships have a group of three university students sitting at the three main courts with three notebooks. They record using a unified template. After the tournament, the data is handed to one person to consolidate, entered into a shared spreadsheet, and published openly on the federation's page.

Immediately, a youth-team coach can open that spreadsheet and answer the question: among under-twenty players this year, who has the highest winning rate in long rallies. That is a key indicator in a sport where fitness and patience increasingly decide outcomes.

Three years later, that data accumulates into a time series. We can see one player gradually increasing average rally length, a sign that base fitness is improving. Or we can see another gradually shortening rallies, a sign of avoiding long exchanges, possibly because an injury has not fully healed.

Five years later, when a player graduates and becomes a coach, he carries with him not only memories of the matches he played, but a library of how others played.

This is the kind of asset that costs no money to buy, only time. And it is the kind of asset we are letting slip away every season.

Notes on an annual season and the signals beneath the scoreboard

Vietnamese badminton's season structure has its own rhythm, different from team sports. In team sports, the season is a continuous run of matches with a table that shifts weekly. In badminton, the season is a series of discrete tournaments, and between those tournaments lie long training blocks where the real work happens.

What is worth noting is this: it is precisely inside those training blocks that data is even more absent. At tournaments, at least there is a score to cross-check against. In training, there is almost nothing.

From my experience observing training sessions of several youth national squads, I see a recurring pattern: training volume is decided by the coach's feel for the squad's condition, adjusted for the upcoming competition calendar. The approach is not wrong, but it makes everything depend on one person.

A training-volume recording system, however simple, would free the coach from the role of memory. It would allow several people to make decisions from the same information base.

And at the athlete level, it would allow something I consider most valuable: the right to see one's own progress.

For a young athlete training six days a week for years, progress happens too slowly to be felt. A person can train slightly better than yesterday, and slightly better than six months ago, but within any single session nothing changes. This is the psychological reason so many young athletes lose motivation.

Data solves this problem. It turns an invisible process into something tangible. It does not make athletes train better, but it makes them persist longer. And at the elite level, persistence is half the story.

The slow movement of a profession

There is one detail I always think about on this subject: sports commentary and analysis in Vietnam also lacks data in its own way.

Writers like me work mainly by watching, remembering, cross-checking and retelling. We have no database to consult. When I need to know how many times a player has met a specific opponent and with what results, I usually have to search through old bulletins, and those bulletins sometimes contradict one another.

This has a direct effect on the quality of information audiences receive. A commentator without data will speak from feeling. Feeling can be compelling, can be moving, but it cannot be accurate in the way data allows.

I say this not to excuse my own profession. I say it because this is a circle: audiences without data grow used to judging by feel, and coaching staffs without data grow used to deciding by feel. An entire ecosystem operating on the same vague currency.

Breaking that circle does not require a revolution. It requires one person to start recording, and another to continue recording after the first has left.

What remains after the shuttle lands

Back to the 41-shot rally at the start of this piece.

I do not remember the names of the two players. I remember that the player who won that rally won it with a shuttle dropped into the front-left corner, after repeatedly pushing his opponent into the two rear corners for the previous twenty shots. I remember that at shot twenty-nine, the losing player began changing footwork a little more slowly. I remember that the stands fell silent for about two seconds before the applause erupted.

The three people I asked did not remember those details. They remembered a brilliant rally. They did not remember why it was brilliant.

That is the entire problem, and also the entire opportunity.

A sporting nation can survive without data. We have survived that way for decades, and we have produced athletes worth being proud of. But a sporting nation that wants to go further needs something else: the ability to hand down what it has learned.

What can be handed down survives. What lives only in memory disappears with the person holding it.

I still keep my notebook. It sits in a drawer of my desk, alongside other notebooks from earlier years. Inside are notes on matches whose scores nobody remembers, but with details I believe are correct.

If tomorrow someone at some badminton hall sits in the third row, opens a notebook and starts counting the shots of the first rally, then the blank space has begun to be filled. No need to wait for a top-down decision. No need to wait for a project. Just one person willing to sit a little longer after the shuttle has already landed.

The question I leave behind is not whether we should measure. The question is: if the next generation of Vietnamese players steps onto an international court with a library of data behind them, how different would their matches look.