The Empty Scoresheet: Vietnamese Volleyball and the Decisions Without a Case File

Late one evening in March, in the technical room of a central Vietnamese arena, I reopened the match report of a national volleyball championship game to cross-check it. The scoresheet had fourteen columns. Seven were empty. The block points column, the service differential column, the perfect-pass rate column — all left blank, their borders still intact like an unfilled form. Beside them, the match supervisor's note contained exactly one line: "No significant complaints."

I sat there for a long time. Not because the match held any mystery. I sat there for another reason: we had just staged a professional volleyball match, awarded medals, added ranking points, written names into the league's history — and had barely preserved anything that could be called evidence. A touch on the antenna. A ball landing near the sideline. A situation with two players jumping at the net. Every moment on which a top-level volleyball match turns vanished the instant the whistle blew.

I was fired for reading the rulebook correctly. Fortunately, some things are only visible from outside the door. And what I see most clearly after years as a league discipline reporter is a gap nobody in Vietnamese volleyball wants to name properly.

Vietnamese volleyball is growing fast in its visible half and standing still in its invisible half: data infrastructure.

Trần Thị Thanh Thúy plays abroad, Nguyễn Thị Bích Tuyền has become an attacker named across the region, the women's national team has claimed high placings in Southeast Asia, domestic tournaments sell tickets, attract sponsors, and get television coverage. The tip of the iceberg thickens every season. But beneath the waterline, where a statistical system, match files, and data to analyze and defend referees' decisions should exist — that part remains dark.

I write this not to accuse anyone. I write as someone who was once pushed out of a press room for daring to cite the rulebook, and was later called back when the rulebook proved me right. Vietnamese volleyball stands at exactly the fork Vietnamese football once stood at years ago: build data infrastructure now, or keep letting every major decision drift away without a case file.

Context: a sport running on instinct

To understand why the scoresheet is empty, you have to understand how Vietnamese volleyball operates.

At the international level, a professional volleyball match is not just two teams hitting a ball over a net. It is a data-collection system running in parallel. The International Volleyball Federation (FIVB) has for years operated the Volleyball Information System — known as VIS — logging every rally by code, every point by attacker, every first pass by quality. At major events like the Volleyball Nations League (VNL), world championships, and the Olympics, each court is fitted with optical camera systems serving two purposes at once: analysis and challenges. People loosely call it the technical challenge system, and it is a direct descendant of football's VAR model — except that in volleyball, it is designed to correct a decision within seconds, not to fuel arguments for days.

In Vietnam's V.League, nearly that entire process is replaced by the human eye. A scorer. A few statisticians, often students working part-time, counting by hand. A paper sheet. And an unspoken belief that has survived for decades: if the referee blows the whistle, that is enough.

That belief was not entirely wrong in the past. When volleyball was a grassroots sport, when matches drew a few hundred familiar faces, an experienced referee could substitute for an entire system. But Vietnamese volleyball is no longer that. Tickets are sold. Sponsorship contracts are signed by the season. Players transfer between clubs for visibly different compensation. When real money appears, the question of evidence must appear with it.

I once helped review hundreds of matches from a single season during the period when football had to be played without crowds because of the pandemic. I built a comparison table between each referee's average yellow-card rate with fans and without, and found a gap large enough to justify a report: the same referee, the same officiating style, but a card rate that shifted with crowd pressure. My superiors told me the sample was too small to conclude anything. They were right on method. But what they did not say was this: precisely because we refuse to collect data seriously, our samples will forever be small.

That is the closed trap. No data, no one dares conclude. No one dares conclude, no one invests in data. And Vietnamese volleyball spins in that loop, season after season.

The core: nine layers of a single gap

I will not complain. I will dissect. Here is how the data gap eats into every layer of Vietnamese volleyball's operation, from on-court technique to the off-court transfer market.

Layer one: tactics blinded in one eye

A good volleyball coach watches a match with many things at once. Lineup, stamina, psychology. But some things the human eye cannot hold, and only data can expose.

At the international level, analysts track the perfect-pass rate — the share of first passes delivered to the ideal spot for the setter to run quick or wing attacks. This number decides almost an entire team's style. When it drops, the team loses variety, is forced to push the ball to the wing for individual handling, and the opponent only needs to guess and block.

In the V.League, that number barely exists on paper. Anyone wanting to know which rotation their team is stuck in must watch the video back with their own eyes. Anyone wanting to know which attacker relies too heavily on ideal sets must count manually. No one does that for a whole season, because there is no resource and no habit.

I have watched many matches, and I keep seeing one pattern. When a team loses two or three points in a row, the coach usually stands up to call a timeout. But in the timeout, they talk about attitude, about spirit, about needing to concentrate. They rarely talk about structure: that we are stuck in a rotation with the setter in the front row, that in that rotation we have only two attacking options, that the opponent has read us and is loading the block on the strong side.

Not because coaches don't know. Because to point that out with numbers convincingly in front of the whole team, they need a data sheet in hand. And they have none.

Layer two: the minimum metric set we never defined

To picture it, here is the minimum set of metrics any professional volleyball league should have, and its state in Vietnam:

Perfect-pass rate — measuring the opponent's serve and your own ball control. Not standardized at league level.

Attack efficiency by attacker — counting not just points but blocks against and errors. Mostly points are counted without subtracting errors.

Blocks per set — the measure of the blocking line. Recorded sporadically, not standardized across matches.

Aces-to-errors ratio — showing which team serves effectively versus handing free points. Entirely ignored.

Dig success rate — the measure of back-row defense. Judged by feel.

Points lost per rotation — the tool for detecting a stuck rotation. Does not exist.

This is not a fantasy list. It is what the VNL, Asian championships, and European leagues publish publicly after every match. A journalist in Thailand can open a laptop and look up who the most efficient attacker in the group stage is. A coach in Indonesia can know which rotation his team bleeds points in most. We cannot.

When data does not exist, every debate about form becomes a debate about impression. People say attacker A is better this season than last, based on feeling. People say team B blocks better, based on a few memorable rallies. Feeling is not wrong. But feeling cannot be brought out to be measured.

Layer three: competition structure and schedule pressure never drawn out

Schedule density is something I have chased for years, in every team sport. In volleyball it is harsher than in football, because of the repeated jumping and landing. A key attacker may perform hundreds of jumps in a single packed week.

But to say the schedule is too dense, you need load data. You need to know how many times that attacker jumped, how she landed, cumulative minutes played, and how far she traveled between tournaments. At European clubs or top national teams, people track these numbers like a heartbeat. In Vietnam, we usually only learn a player is tired after she collapses and gets injured.

Every time a women's national team star suffers a serious injury at a decisive stage, public opinion surges for a few days and then quiets. No one traces the cause because there is no load log. No one can answer: did that injury come from a single collision, or from three months of accumulation no one noticed?

That gap's price is measured in a person's career.

Layer four: the regional picture and the advantage of those who started first

Southeast Asian volleyball has a hierarchy that has been stable for years: Thailand leads in the women's game, partly because they were years ahead of Vietnam in analytics infrastructure. Thai clubs in the national championship have their own statistical departments. Major matches are coded by rally, serving the national team too.

Vietnam has the advantage of human resources and fan interest, especially in recent years as domestic women's volleyball has drawn surging viewership. But that advantage is being drained by a fixed weakness: we produce outstanding individuals, then place them in a system that cannot measure them.

When compared with stronger volleyball nations in the continent — Japan, China, South Korea — the professional gap is not only in height and technique. It lies here: a Japanese player receives a personal report after every match, with metrics, cut video, and a comparison against her own previous match. A Vietnamese player after most matches receives a comment from a coach.

The advantage of starting first, in the end, is not that they know more. It is that they record more.

Layer five: rules, and challenges without tools

In modern volleyball, the technical challenge system is an official part of the rules. The captain can request reviews of certain situations — ball in or out, ball touching the block or not, foot faults under the net, ball touching the antenna. At many international events this happens within seconds, thanks to optical cameras and a system displaying the ball's trajectory simulation.

In Vietnam, most matches lack that system. This means the right to challenge exists on paper but without the tools to fully exercise it. When a team believes the ball touched the block, they can only speak. The referee can only decide by what the eye sees. Both sides are right within their limits, and both are helpless before a truth that may have been missed.

I once requested an interview with an international referee at a major event and was flatly refused on the grounds that the technical area was not for women. I did not argue. I went up to the stands and counted. I recorded every minute of stoppage time, every card, every challenge. When my investigation was published, citing specific data and timestamps, those who had dismissed me went silent — not because I was better, but because that time I had evidence and they did not.

That lesson applies directly to Vietnamese volleyball. When VAR scrutinizes something said, I do not argue. I let the camera testify. But to have a camera testify, there must first be a camera installed in the right place and a process written clearly.

The problem is not that Vietnamese referees are weak. The problem is that we ask referees to do work that at the international level requires technology and a team. We send them onto the court with two eyes and a whistle, then compare them to people with ten cameras behind them.

Layer six: people and the professional void

A data system does not run on will. It runs on people.

Vietnamese volleyball needs a profession that does not yet officially exist: the match-data analyst. Not a camera operator, not a scorer, but someone who reads data and turns it into tactical recommendations. In leading volleyball nations, this role sits inside the coaching staff, with its own seat and its own voice.

In Vietnam, if anyone does this work, they usually do it as a volunteer, a semi-professional, or without adequate pay. And when a job is not paid what it is worth, it will not attract the best people, and data quality falls off exponentially.

Parallel to that is the coaching problem. Many Vietnamese volleyball coaches are skilled, but were not trained to read data. They grew up in a volleyball culture where instinct was king. Handing them a table of numbers without teaching the skill to read numbers is useless.

And at the management level, the problem is drier: no one is responsible for data. No one is asked why the scoresheet is empty. No one is evaluated on the quality of match files. When there is no responsibility, there is no product.

Layer seven: risk layers never audited

A data gap breeds a chain of risks we cannot see because we have no table to list them.

Professional risk: an attacker whose weaknesses are repeatedly exploited over many matches, with the coaching staff unaware because there is no comparative data.

Human risk: injuries that accumulate because no one tracks jump load and cumulative minutes.

Schedule risk: a packed season planned without recovery data.

Rules risk: a wrong decision never corrected because there is no tool, and the fallout stretches into a crisis of confidence.

Public-opinion risk: fans increasingly used to international events with technology, returning to the domestic league and finding everything hazy.

Systemic risk: the next generation judged by feeling, and genuine talents missed because no one can measure them.

Of all these risks, the last is the most worrying. A volleyball nation can lack technology and still rise, if it has a data culture. But a volleyball nation lacking a data culture will only use technology as decoration, even if installed.

Layer eight: the fans' narrative and expectations

Vietnamese volleyball fans have changed a great deal in recent years. They no longer come just to cheer. They come with phones, live scoreboards, instant lookup. They compare a Vietnamese attacker with a Thai or Japanese attacker. They know basic metrics.

This creates a painful paradox. Fans grow more knowledgeable, yet the official data source of the very league they follow falls further behind their understanding. That gap accumulates into suspicion. When there is no data to verify with, rumors fill the void. And rumor always has a force ready to spread faster than the truth.

In the transfer window, this is clearer still. A player changes clubs, fans debate the figure. No one has an official number, so everyone builds one in their head. The club stays silent, the agent half-speaks, the press chases the noise. The result is a market running on rumor rather than information.

In football, we already learned that when transfer data is not transparent, the price is paid by football itself. Volleyball is walking that exact road, only with less attention.

Layer nine: the transmission chain from court to market

The data gap does not stop at the court's edge. It flows down the entire value chain.

Upstream, youth development lacks gauges. An academy with no metrics cannot know what kind of player it is producing, what skills are missing, how they progress year by year.

Midstream, the professional league lacks files. This makes player evaluation dependent on televised matches, meaning players from less-broadcast teams are invisibly disadvantaged.

Downstream, media and the commercial market lack raw material. A sponsor wanting to know why to fund team A over team B needs viewership, engagement, and player brand-value data. Without data, the sponsorship decision becomes a relationship decision.

And at the deepest layer, the transfer market lacks a basis for valuation. What is a player worth if no one can measure how many points she contributes per set? How is a blocker valued if no one counts successful blocks and balls hit past her? In such a market, prices are set by fame, by connections, by luck — not by real value.

I know some domestic volleyball clubs have begun hiring people to film and cut match video for internal analysis. That is a good signal. But doing it in isolation only creates a temporary advantage for one club. For the whole sport to rise, there must be a shared standard everyone follows.

The counterintuitive angle: the problem is not technology

At this point, people usually jump to the easiest conclusion: Vietnam lacks technology. Buy camera systems. Install software. Name the volleyball version of VAR and wait for it to fix everything.

I do not believe that. And here is where I must be blunt, even if it is not pleasant to hear.

Our problem is not a lack of technology. It is a culture that treats data as decoration, not as evidence.

The proof does not lie in the fact that arenas lack cameras. It lies in this: even when data can be recorded by hand, we still do not record it. Even when a simple handwritten scoresheet is possible, we still leave seven of fourteen columns empty. Technology only amplifies what already exists. If what exists is a habit of ignoring data, technology will help us ignore data faster and more beautifully.

I know this because I was once inside that trap myself. I once sat before an empty analysis result, where every information field was blank, where not a single data point existed to hold onto. And I understood that in that situation, the only way to keep my integrity was to admit: there is nothing to analyze. I could not invent a conclusion just to seem useful.

With no crowd in the stadium, I saw the referee tremble. Not from pressure, but from a lack of actors to perform for. Likewise, a data system with no real users, no one responsible, no one judged on file quality, will only be a machine running idle. Installed, lights on, screen glowing, and in the end no one opens it.

The second thing few want to hear: perfectionism is the enemy of data. Someone will say there are not enough resources, not enough staff, not enough standards to begin. That argument sounds very reasonable, and it has killed many projects before they were born. But data does not work that way. Data works on accumulation. A handwritten fourteen-column scoresheet, however imperfect, is still worth more than an empty sheet designed to become perfect someday. This season's fourteen rough columns will be the foundation for next season's more accurate fourteen.

Rules do not feed people, but people feed the rules with model rallies. Likewise, data does not feed a volleyball nation. It is the people willing to record every rally who give data meaning.

And the third, most counterintuitive point: transparency does not weaken a referee's authority. It protects them. When a controversial decision is reviewed on video and the conclusion is that the referee was right, trust in referees rises, not falls. It is the haze that kills credibility. An unverifiable decision will be doubted forever, even when entirely correct. But a publicly verified decision, right or wrong, closes the story.

In many years in this profession, I have learned that the truth does not float up on its own. It must be recorded, archived, cross-checked, and published. None of those steps is skippable.

Takeaway: a proposal with no apology

I do not write this to demand anything grand. I write to propose a small thing that can start next season: every match in the national championship must have a full fourteen-column scoresheet, with a responsible person signing it, published publicly after the match. No optical cameras needed. No trajectory simulation needed. Only a person sitting there, recording, and a signature saying that person is answerable for what was recorded.

A full scoresheet at every match would create three things. It gives coaches a mirror to examine themselves. It gives referees a file to defend their decisions. And it gives fans a basis for belief instead of guesswork.

Vietnamese volleyball is now big enough that it can no longer be allowed to run on memory. When a season passes, if all that remains is fragmented fan memories and medals in a cabinet, then we have dropped most of our own value. People cannot learn from a match they did not record. And a sport that cannot learn from its past will repeat the same mistakes, season after season, until someone patient enough sits down and starts filling in the empty boxes.

I am ready to sit down. The only question left is: will anyone sit with me.