A Report That Returned Zero: Vietnamese Volleyball and the Nine Dimensions Nobody Has Measured

Last week, at 1 a.m. Incheon time, I opened a two-stage analytical file about volleyball. Outside the window, sleet hit the metal roof; inside, only the fan was moving. The file was the right length for its form: nine sections, each with tables, a risk matrix, and a liability disclaimer at the end. But every data cell carried the same line: N/A — insufficient information.

"Spike success rate": N/A. "Blocks per set": N/A. "Ace-to-error ratio": N/A. "Perfect-pass rate": N/A. "Dig rate": N/A. Opposition analysis: no opponent. Competition-system section: no competition. Generational-transition section: no athletes. Industry-transmission section: three arrows connecting three empty boxes.

I read all four pages and then sat still for a long while. A report that returns zero is not the fault of the person who wrote it. It is a measurement. It says that somewhere, a data system was never built, and therefore nobody can ask anything specific about a volleyball match — not even the simplest questions.

That is why I am writing this.

Context: no shortage of matches, only a shortage of somewhere to write things down

Vietnamese volleyball does not lack matches. In a single season, the national women's team plays two legs of the SEA V.League, the AVC Challenge Cup, several international friendlies, and the regional multi-sport games. At club level, the national championship runs for months, with foreign imports, sponsors, live television and crowds. The VTV Cup and other invitational tournaments return on schedule on home soil.

Because of that, people easily assume data is plentiful too. A match is broadcast live, has commentators, an electronic scoreboard, reporters on the sideline. Afterwards there is news, photos, interviews. But place two questions side by side — "who won" and "why did the winner win" — and the first always has an answer while the second is usually blank. An electronic scoreboard does not record the trajectory of a ball after a pass that missed by half a metre. A camera does not count the number of times a middle blocker had to leave position to cover for a broken dig.

I have been in this trade long enough to distinguish two kinds of silence. The first is the silence of the stands — the one I wrote about in my series "Football Without Noise" when stadiums closed, when average goals per match crept upwards and people finally noticed that modern data had forgotten the mental factor. The second is the silence of data — when nobody sits down after a match to record what actually happened on each rally. The second is far more dangerous, because it leaves no echo. It leaves only an empty cell in a spreadsheet.

The analytical framework I received last week has nine dimensions. Those nine are not a list to read for pleasure. They are the order of the questions. The first asks about tactics: what structure does the team play. The second asks in numbers: how effective is that structure. The third asks about competition systems and calendars. The fourth about the regional landscape and resource position. The fifth about rules and governance. The sixth about team building and people. The seventh about risk. The eighth about public narrative and expectations. The ninth about transmission across the whole industry, from youth development to the broadcast market.

A mature system answers all nine. In most developed volleyball nations, those nine boxes have someone responsible, or at least someone temporarily responsible. Elsewhere, all nine are empty at once, and that is nobody's private business: it is about how a sports industry organises its own record-keeping.

Nine dimensions, and what actually sits beneath each empty cell

Dimension one: tactics. Modern women's volleyball in Southeast Asia follows a fairly clear template: the setter pushes quick balls to both wings, the outside hitter attacks at position four, the opposite carries most of the difficult balls at position two, the middle blocker anchors the central block and attacks quickly at position three. The tactical question is not which template to use — almost everyone uses the same one — but whether the serve-reception system can hold that structure together. When the first pass drifts three metres off the net, the setter is forced to send a high ball to the wing, and the outside hitter must attack into a block that has already set. Three such rallies in a row and the attacking rhythm collapses, while the scoreboard outside the court still records points for both teams.

That is why, when I watch a volleyball match, I keep two columns: one for points, one for the number of times the first pass put the ball into a workable setter zone. The second column never appears on screen. But it is the column that explains the first.

Dimension two: data. The five metrics that report left blank — spike efficiency, blocks per set, ace-to-error ratio, perfect-pass rate, dig rate — are not five random metrics. They were chosen because they form a causal chain. Serving creates pressure that leads to a poor first pass; a poor first pass leads to a predictable attack; a predictable attack leads to a higher block rate; being blocked repeatedly leads to defensive hitting; defensive hitting leads to a rising dig rate alongside falling spike efficiency. That chain can only be read if all five links exist. Remove one link and the rest automatically becomes anecdote.

Dimension three: competition system and calendar. The four-year Olympic cycle governs the entire season structure of national teams. Between two Olympic Games lies a long stretch in which most regional tournaments serve only as qualifiers or ranking events. For teams outside the Olympic group, that stretch becomes a grey zone: matches are played, results exist, but no objective forces measurement. Calendar density is a double-edged sword. A team that plays too often loses its legs in the fourth set. A team that plays too rarely loses its capacity to handle pressure in the fifth. Both cases leave traces in the data, if there is data to read.

Dimension four: landscape and resource position. Asian women's volleyball has a fairly stable hierarchy at the top, while the rest is in permanent motion. The top group has advantages in average height, in the number of athletes developed properly from childhood, and in year-round access to high-quality international matches. The lower group has advantages in hunger and in the cost of staging events. The gap is not in spirit; it is in how many backup solutions a team has when its primary solution is neutralised. A team with six hitters at comparable level differs from a team with two hitters and four players just holding the rhythm. That difference only becomes visible when somebody records how many points position X scored from how many touches.

Dimension five: rules and governance. Playing rules, player registration, foreign-player quotas, transfer deadlines — each has a written version, that much is clear. What is unclear is enforcement. When a club registers a foreign import mid-season, the paperwork may be entirely correct, yet the real question stays outside the document: did that player come to play, to plug a hole, or to avoid a different financial obligation. In the transfer market, noise outweighs signal. The structure of clauses and the wage bill are the real story; the name is just the visible part.

Dimension six: team building and personnel. A national team has a life cycle. Trần Thị Thanh Thúy, Nguyễn Thị Bích Tuyền, Đoàn Thị Lâm Oanh, Hoàng Thị Kiều Trinh and Nguyễn Thị Kim Liên — that list belongs to a particular era. A team's life cycle tends to follow one path: bonding, peak, transition, restructuring. What matters is that the transition phase is not marked by a date on a calendar. It is marked by a match in which, in the fourth set, the coach looks down the bench and sees no one to send on.

Dimension seven: risk. The risk matrix in that report had six rows: competition, personnel, calendar, rules, public opinion, system. Those six rows sound like formality, but they answer one practical question: if everything goes wrong tomorrow, what collapses first. In volleyball, what collapses first is almost always the first pass. A team can lose an outside hitter and stay upright. A team that loses its reception system loses everything within six minutes.

Dimension eight: public narrative and expectations. There is a notable gap here. Public expectation usually runs one step ahead of reality, and public opinion tends to pick one individual to carry the whole story. An outside hitter who scores thirty points becomes a symbol. Those thirty points may be the result of a setter distributing to a favourable position eighteen times in a row — a detail nobody remembers. When the team loses the next match, the same name is questioned in reverse. Opinion reversing faster than a team can recover is a sign that the statistical foundation lacks support.

Dimension nine: whole-industry transmission. The chain has three segments: upstream is youth development and athlete supply; midstream is the professional league and the national team; downstream is broadcasting, commerce and derivative markets. Each segment has its own health indicator: the number of children selected each year, the number of televised matches, actual attendance, sponsorship contracts. Beach volleyball sits on a separate branch, usually pushed to the margins, yet it is the cheapest place to test a data-recording system.

When all nine boxes are empty at once, people easily read a pessimistic conclusion. I do not read it that way. I read it as a to-do list that has already been sorted.

The contrarian angle: the blind spot is not missing numbers, it is missing questions

Data is like a lens: sharp at one distance, distorted at another.

In recent years, whenever the weakness of a sports system is discussed, the reflex is to demand more data. Hire a data provider, buy tracking equipment, open training courses for coaches. I used to think that, and I still think data is right. But a report that returns zero forces me to say the harder thing: the problem for most emerging volleyball nations is not a shortage of data. The problem is that nobody is asking questions.

There are three execution blind spots I see repeating.

The first is confusing "recording" with "measuring". Recording means saving video, saving the scoreboard, saving photos. Measuring means assigning a number to a specific behaviour by a specific person at a specific moment, then comparing that number with the same person in the previous match. A match can be recorded from four camera angles and still contain not a single measurement.

The second is measuring the wrong place. People tend to measure outcomes — who scored, who was named most valuable — because outcomes are visible and memorable. But the decisive part happens earlier: in a first pass that drifted twenty centimetres, in the footwork of a middle blocker leaving the centre, in a ball nobody touched. Fans remember the spike; I remember its trajectory. And in volleyball, the trajectory usually begins with a player who never touched the ball last.

The third, and most important, is measuring to prove rather than measuring to understand. When data is used as a performance report, people select only the favourable metrics. When data is used to understand, people must accept that unfavourable metrics get recorded too, even when nobody wants to read them.

Good tactics do not win on the whiteboard; they win in the call made when the whiteboard collapses.

There is a paradox worth stating plainly. Volleyball is a sport whose scoring structure is relatively easy to track by hand — five basic metrics are enough to reconstruct most of a set's story. That means a start is possible with no special technology at all: a notebook, one person on the sideline, one evening. The reason the system has not been built is not that it is hard. It has not been built because nobody sees the benefit within a single season.

A young coach once called me to ask permission to reuse a tactical diagram I had drawn in a long article that younger readers had called dry. That call taught me something: the value of data is not in the moment it is published, but in the moment it is used again. I believed in intuition until a young coach taught me how to count.

The gap between the court and the spreadsheet

An empty gym does not make a match worse; it only exposes what we were not hearing.

What I have observed across many seasons is that in regional volleyball tournaments, events tend to follow a familiar sequence. A team wins several matches in a row, public opinion builds a legend, the legend is repeated often enough to become part of an identity. Then the team meets an opponent with a taller block, and the legend helps nothing. Nobody has a record of how the team won the previous matches.

For national teams in the region, the biggest gap is usually not physical. It is the quality of the second ball. The first ball determines who touches the ball. The second ball determines the state in which it is touched. And the quality of the second ball is almost never recorded, because it does not produce points directly.

Data should start there. But most existing platforms start only at the score.

A view from the industry: who pays for counting

A difficulty rarely discussed is the economics of record-keeping. Recording data requires people, time, and a reason to continue across seasons. Clubs pay for imports, for coaches, for travel. Clubs rarely pay for someone to sit and log every rally. Meanwhile, the real value of measurement only appears from the second season onwards, once continuous comparison becomes possible.

Beach volleyball is an instructive exception. Staging costs are low, the number of participants is small, the number of points to record is small, and outdoor conditions strongly affect results. This is an ideal environment to test a minimal recording system: for instance, logging rallies by wind direction and time of day. If such a system holds up on sand, it can be extended indoors.

At tournament level, a cheaper and more durable approach is to teach record-keeping to reporters and local volunteers, then merge the data into a shared set. Several volleyball nations have taken this route: starting with a small group on the sideline, not with a large contract.

In the current phase of the transfer market, I notice a familiar phenomenon. Transfer news appears in density, yet almost none of it carries a measurable number — no disclosed fee, no specific contract length, no minutes played last season. Readers receive names, not evidence. It is the same disease, only a different season.

The biggest current risk

If I had to pick one risk more worrying than the rest for the coming cycle, I would not pick injury and I would not pick the calendar. I would pick the erosion of memory.

A sports system can lose repeatedly and still recover, if it knows why it lost. It cannot recover if every generation must start over, because the previous generation left no record beyond personal memory. Personal memory is finite, and it always edits itself to be more comfortable.

In that sense, a report returning zero is a good sign in the strangest way: it shows that at least somebody asked. A system that honestly answers "I don't know" is still better than one that answers "yes" by inventing a number.

What to verify in the next match

Tactics are not a diagram on a whiteboard, but decisions inside a quarter of a second.

I will take that notebook to the next match I can watch, even if it is on a screen half a world away. And I will count exactly five things, no more: the number of first passes that put the ball into a workable setter zone; the number of times a middle blocker had to leave the centre to cover; the number of times the opposite had to attack from outside position two; the number of rallies in which the opposing block was fully set before the ball left the setter's hands; and the number of times the team held its attacking rhythm after losing a long rally.

Those five numbers need no expensive equipment. They need one person sitting still for the whole match and missing no rally.

If, after that match, I can still only retell the result and not how it unfolded, then the problem is not the match. The problem is that we have become used to remembering scores and forgetting structure. And that habit can only be broken by starting to count, from the very next match.

The tenth dimension, the one no template includes, is the dimension of the person who stays behind. I will be the one who stays behind.