The Empty Report: What Vietnamese Volleyball Lacks Is Not Talent, But Records

That night I received a fourteen-page file with a very serious name: BC_BCVN_2020_TongHop. The sender was an old colleague, the kind of person who never fills in a box carelessly. I opened it and saw the headings lined up neatly: number of direct service aces, effective block rate per set, number of net-touch faults, number of accepted video challenges, number of sanctions by set. Beside each heading was an empty box. Not a single number.

I called him. He said something I have carried with me ever since: “I know the labels. But there is no source to pull the numbers from.”

An outsider would read that as sloppiness. People inside the trade read it differently. To fill a single box, you need four things: the referee's record, the technical statistics sheet, multi-angle video data, and a person accountable for signing their name to that number. In Vietnamese volleyball, usually only one of the four exists.

And I realized something more important than the content of that report: an empty report, if properly assembled, is not a failure. It is a finding. It says we already know what needs measuring, but we do not yet have a system to measure it.

A sport moving faster than its own infrastructure

Over the past two decades, Vietnamese volleyball, especially the women's game, has advanced along a line that people inside the sport feel more keenly than anyone. The national women's team has repeatedly been in the medal-contending group at SEA Games and continental tournaments. Names such as Tran Thi Thanh Thuy, Nguyen Thi Bich Tuyen and Doan Thi Xuan have stepped out of the domestic frame and become familiar faces to regional audiences; some internationals have even played in Japan, bringing back higher training and competition standards. The stronger clubs in the domestic league build their squads more methodically, sign better foreign players, and invest more in medical and physical support.

Audiences grow. Broadcasters invest. Sponsors take notice. Everything moves up.

Only one thing has not moved up at the same pace: the ability to record and retrieve data from the match itself.

I sat through a domestic semifinal where the screen showed only the score, the players' names and a line about height. No first-pass rate. No point distribution by position. No unforced error count. No block table by set. A match told through feeling, not through record.

Compare that with the international stage and the gap becomes obvious. At events run by the FIVB, every match is coded at the level of the individual rally: who served, who received, where the pass went, who set, who attacked, whether the ball was blocked. That data is published almost instantly and becomes shared reference material for the entire analytical community. In a domestic league match, the same rally, if no one is counting, vanishes from history the moment the final whistle blows.

That is the strange paradox of Vietnamese volleyball: we have a very good collective memory, but almost no technical archive. We remember a defensive save from ten years ago, but cannot recall the first-pass rate of last season's champions.

The three data layers of a volleyball match

To understand a volleyball match properly, a professional needs three layers of data stacked on top of one another.

The first layer is event data. Every rally is coded into a sequence of actions. At top-level events, someone sits courtside, fingers tapping into software, and by the time the whistle sounds a live table is already available. This is the driest layer, the most useful, and the one most severely missing in Vietnamese volleyball.

The second layer is video data. Not one broadcast angle, but many angles, at many speeds, enough to reconstruct a rally in a few seconds. This layer determines the capacity to review, and therefore the capacity to adjudicate.

The third layer is the record. What fault, at what moment, signed by whom. This layer belongs to the referee crew, and in Vietnam it is the only layer kept with relative consistency — because referees are obliged to write things down, or they have no basis on which to resolve protests.

These three layers must align. A rally recorded in the log must be findable in the footage, and must be confirmed by event data. When one layer is empty, the other two lose their cross-checking value. The log says there was a net touch, but if no camera captured that instant, the ruling stands on air. The statistics sheet says blocking was highly efficient, but if no one recorded the specific rallies, the number becomes an unverifiable claim.

That is exactly the state of the fourteen-page file. The author drew all three frames, then stopped, because the first layer had no material.

Based on my experience watching matches in domestic competitions across many consecutive seasons, I can say the first layer of Vietnamese volleyball is empty in almost every match that is not televised live, and only thinly filled in matches that are broadcast.

Why the event layer is empty

The reasons are very concrete, and they have less to do with money than people assume.

The absence of a standard statistics protocol is the first reason. A volleyball data coder must be taught to distinguish a perfect first pass from a usable one, must know whether a blocked attack is an attacking error or a blocking point, must understand when a rally counts as an out-of-system attack. Without a unified protocol, each person counts differently, and data from two sources cannot be merged into a single time series.

The shortage of trained personnel is the second reason. A volleyball match moves far faster than spectators perceive. A coder must tap several times within a few seconds of a single rally, and half a beat of delay means lost data. This is skilled work, not something anyone can pick up.

The lack of a publication mechanism is the third reason. Data that is not published is data no one checks, no one corrects, and no one builds upon. A wrong number that no one notices will persist forever and become the foundation for further wrong conclusions. This is what I learned when I had to review the records of past seasons: a small error at the event-data layer multiplies into a large error at the conclusion layer.

And there is a cultural reason I consider the most important. We watch volleyball to feel, not to measure. Spectators remember a rally because it was beautiful, not because it was efficient. Organizers log a match because it finished, not because it left behind material. When the whole system treats data as a by-product rather than an asset, an empty event layer is inevitable.

But my profession taught me that feeling and evidence do not exclude each other. They need each other. A beautiful rally with no record is beautiful only once. A beautiful rally that is recorded can still teach the next generation.

The video challenge system: volleyball's cousin of VAR

Volleyball does not have VAR in the football sense. But it has a close relative: the video challenge system. The captain raises a hand, the referee stops play, the technical crew reconstructs the rally on the big screen or a monitor, and the decision is made after the footage is replayed.

I was thrown out for reading the rulebook correctly. Fortunately, some things are only clear from outside the door.

When the challenge system turns its lens on a rally, I do not argue with the stands. I let the frame testify.

And precisely because of that, I understand better than most that the limit of the system lies not in the rules but in the number of camera angles. The rules permit a review, but rules cannot create an image that was never captured. When there is only one angle, and that angle is obscured by a body, the review stops being a check and becomes a guess wearing a technological label.

This repeats across volleyball competitions, from small to large, with the same script: a contested decision, a replay screen that fails to convince, and a crowd splitting into two halves believing two different things. The incident does not end with a conclusion. It ends with two parallel memories.

As someone who has worked in competition discipline, I have had to handle protest files where the only evidence was a blurry clip filmed from an angle no one controlled. There I learned a principle I still keep: when evidence is insufficient, the honest answer is to declare the evidence insufficient, not to choose the more palatable conclusion.

People often assume a strong disciplinary panel is one that rules often. That is wrong. A strong disciplinary panel is one that knows when to stop because there is no basis.

A referee between two kinds of light

The season without spectators left me with data I had not expected.

That year I had to review the records of hundreds of matches already played, cross-referencing referee logs with the context of each game. What I found was not about technical skill but about environment. The same referee crew, the same pitch, the same rules — but the rate of sanctions changed with the noise of the crowd. With a full stadium, referees issued more cards; with an empty one, that figure fell. I presented the finding in an internal report, was told it was speculation based on a small sample, and spent further seasons expanding the comparison table.

An empty stadium, and I saw referees shake. Not from pressure, but from a lack of actors to perform for.

That sounds paradoxical, but it is true to the trade. A referee's decision is not only an application of rules. It is a performance with an audience. When the stands are empty, referees lose their instant feedback, the ambient sound that normally confirms their decision is being seen. Without that feedback, they blow the whistle differently.

This connects directly to the empty report. If the rate of sanctions shifts with the crowd, that is a measurable phenomenon, and it should have been measured. But to measure it, you need first-layer event data: the moment, the score, the type of fault, the level of sanction. When that layer is empty, the argument ends in personal feeling, and everyone believes something different.

In 2026, still very young, I wrote an analysis of a penalty confirmed by technology, in which I pointed out a ball contact lasting only a few hundredths of a second before the foul, based on slow-motion footage released by the organizers. The piece was mocked. I did not respond with emotion. I responded by building a comparison table of multiple technology decisions within the same round of matches, to show which side the refereeing trend leaned toward. That table, not the argument, is what silenced people.

That experience shaped how I work today: I never defend a judgment with tone. I defend it with rates.

The empty report as a diagnosis

Back to the fourteen-page file.

Seen as a product, it is a failure: no figures, no conclusions, no usable value. Seen as a measurement, it is valuable. It pinpoints exactly where the information system of an entire sport breaks.

An empty report tells me four things.

It tells me that professionals already know which indicators volleyball needs. We are not short on technical understanding. We know first-pass rate matters, point distribution by position matters, unforced error counts matter.

It tells me the gap between understanding and execution is wider than we think. Knowing what to measure and being able to measure it are two different things. Between them lies infrastructure: people, software, process, and money.

It tells me we are losing an accumulating asset. Every season that passes without leaving data behind is a season lost forever. Data cannot be recovered, just as an unrecorded rally cannot.

And it tells me that in a data-poor environment, people tend to fill the void with emotion. With no table of figures, we tell stories. With no table of figures, we believe whoever speaks loudest. With no table of figures, fairness becomes a feeling rather than a conclusion.

I once read an analysis of international volleyball in which every claim had a root. A judgment on attacking efficiency came with a set-by-set percentage. A judgment on blocking came with a specific rally count. The writer needed no strong adjectives, because the numbers did that work for him. That is the style I want to see in Vietnamese volleyball, but it can only emerge when the infrastructure allows.

A counter-intuitive angle: people do not want the right analysis, they want a full one

There is something I have to say plainly, even if it is not easy to hear.

In the sports industry, when someone requests an analysis, most of the time they do not truly want a technical conclusion. They want a product that looks complete. They want a document they can present, cite, and bring into a meeting without anyone asking hard questions. An empty report irritates the person who commissioned it, not because it is useless, but because it forces them to face a larger question: the system is operating without data.

The natural human instinct is to fill the blank box. An estimated number is still more comfortable than a white space. An inferred judgment is still more comfortable than silence. And in many meetings, what gets called “analysis” is in fact a chain of guesses written in a confident voice.

I have been in the position of choosing between two bad options. Either give a number with no source and accept it will be used as truth, or leave it blank and accept being judged incompetent. I chose the second. Not because I like purity, but because I know the cost of a wrong number. A wrong number published today becomes the foundation for ten wrong conclusions next season, and no one can trace it back.

There is another counter-intuitive angle I want to put on the table. People assume a lack of data is a problem of small, underdeveloped sports nations. Look closely and it is the reverse. Strong sports nations do not have more data because they are rich. They are rich partly because they have data. Data is what turns a match into a reusable asset: for analysis, for scouting, for coaching, for media, for commerce. A match that is not recorded is only an event that has passed. A match that is recorded is an asset still generating returns years later.

Rules do not feed people, but people feed the rules with model rallies.

That is true of referees, and true of data. Without recorded model rallies, the rules are just a document sitting still. Without coded matches, indicators are just concepts in a book. It is the specific rallies — recorded, replayed, cross-checked — that sustain the whole system.

And there is a point I must stress, because it is often misunderstood. Admitting “insufficient information to analyze” is not a defensive act. It is a professional conclusion with value equal to any other. In medicine, a test that cannot conclude because the sample failed standards is important information about the sampling process. In sports adjudication, a file lacking sufficient basis for a conclusion is important information about the organizers' evidence-gathering capacity. By the same logic, an analysis blocked by missing input data is important information about the infrastructure of the entire sport.

What we lack is the culture to read those signals. We read only the conclusion. We skip the notes about data limitations, the warnings about small samples, the acknowledgements of gaps. And by skipping them, we inadvertently reward exaggeration and punish caution.

Once caution is punished, people choose exaggeration. That is the mechanism that produces reports stuffed with figures, none of which can be verified.

What I take away after many seasons

I began writing a professional diary with a structure of rules, data and timing. That style formed after a very small incident. Years ago, as a student intern, I watched a match and kept meticulous notes on an offside situation, then proposed an analysis to the disciplinary board. I was brushed aside with a question about my gender. Three weeks later, the official conclusion matched what I had written, and no one came back to say a word to me.

From then I understood something I keep as a working principle: evidence does not need a defender, it needs a recorder. The powerful in a meeting room can dismiss an opinion, but cannot dismiss a published table of figures. The job of a professional is not to win an argument, but to make the argument undeniable.

And to do that, the first thing needed is not a clever line of reasoning, but a complete file.

In volleyball, what does that mean?

It means every domestic match needs a minimum event-statistics sheet, compiled under a unified protocol, with an accountable person, and published openly. That sheet does not need to be as complex as at the world's top events. It needs enough to answer basic questions: which team passed better, who scored most in the decisive moments, where the errors were and when.

It means every refereeing decision needs to be recorded with context, not just with a conclusion. The moment, the score, the type of fault, the level of sanction. When such data accumulates across seasons, we begin to see trends no individual could observe with the naked eye.

And it means we must accept that some questions will go unanswered for years, because the data to answer them was never collected.

Conclusion: a blank box is not something to be ashamed of

There is one detail in the opening story I have not told.

When I called my colleague back and asked why he still sent that file knowing it was empty, he answered: “Because if I did not send it, someone else would send an identical one with the numbers filled in.”

That answer made me think for a long time. In a system where a blank box is treated as shameful, the thing produced most abundantly will not be data, but numbers invented to fill the space. And when those numbers enter the record, they are not merely wrong. They erase the possibility of ever knowing the truth.

Vietnamese volleyball is at a moment where, if it builds data infrastructure now, in ten years it will have a body of material thick enough to analyze itself. If it does not, in ten years we will still be arguing about past rallies from memory, still adjudicating from a single angle, and still calling confident guesses analysis.

What I want to leave behind is not a call to action, but a way of seeing. An empty box, left empty honestly, is a document. It records our limits at a specific moment, and precisely because of that it holds a value a fabricated number can never hold. A professional may be undervalued for daring to leave blanks, but the history of a sport can only be written from what was actually recorded.

And if one day Vietnamese volleyball finishes building its data infrastructure, I believe that fourteen-page file will be preserved — not as a failure, but as the first page of a file that finally means something.