The Empty Cells in Vietnamese Volleyball's Statistics Sheets

In a small room behind stand B of the arena, a laptop sits open. Its screen shows a spreadsheet with twelve columns: successful spikes, blocked attacks, block efficiency, direct service aces, perfect first-pass rate, digs, positional faults. The column headers are complete, written to a standard any international analyst could use immediately. Only the rows are empty.

Beside the laptop lie a paper notebook and a ballpoint pen. The team's assistant analyst records by hand. Each rally that passes, he draws a tally mark. At the end of the set, he adds them up. At the end of the match, the notebook is closed and put away in a bag. No one on the coaching staff asks for it. No one enters it into the machine. The next day a new match begins, and the notebook opens again at a blank page.

That image has followed me through several recent seasons, every time I sit in the technical area of the national volleyball championship.

Context

Vietnamese volleyball is in its most-watched period in two decades. The women's national team won silver at SEA Games 31 on home soil in Hanoi in 2026, repeated it at SEA Games 32 in Phnom Penh in 2026, then won the 2026 AVC Challenge Cup in Manila with a 3-0 final victory over Kazakhstan. Names like Tran Thi Thanh Thuy, Nguyen Thi Bich Tuyen, Doan Thi Lam Oanh and Nguyen Thi Kim Lien have become familiar keywords, appearing in short clips shared hundreds of thousands of times.

Attention brought money. Clubs grew bolder in signing foreign players. The national championship split into two phases, with sponsors, live television and ticketed spectators. A match in Ninh Binh or Long An can now draw an online audience comparable to a first-division football match.

But one thing has not grown with it: the ability to read a match through numbers.

At international level, the world volleyball federation has run a match information system for years. Every Volleyball Nations League match is recorded under a single set of definitions: what counts as a kill, what counts as an attack error, what counts as a perfect set. That data is published openly, anyone can download it, and every tactical argument starts from there.

Regional volleyball nations are also a step ahead. Thailand publishes round-by-round statistics from its national championship. Indonesia and the Philippines do the same at a lower level but consistently. In Vietnam, most data stays in the technical room.

Analysis

There are three layers of rupture, and they connect into a closed loop.

The first is the recording layer. The national championship organiser still assigns recorders. But that record serves administration — confirming scores, confirming line-ups, handling protests — not analysis. It is not standardised to international definitions, it is not cross-checked, and most importantly, it is not published.

The second is the transfer layer. If a head coach wants to know his outside hitter's efficiency in the fourth set of a semifinal, he has to count it himself. If he wants to know which zone the opposing libero passes poorly from, he has to rewatch footage and memorise it. The memory of a Vietnamese volleyball coach is one of the most precise instruments in the country's sport. It has one drawback: it cannot be copied.

The third is the interpretation layer. Without standard data, decisions are made by feel. A player is called up because she played well in three matches the coaching staff happened to watch. Another is overlooked because her team lost, even though her individual numbers led the tournament.

In a twelve-square-metre room, 120 races taught me to listen to my own breathing.

I learned that during two months when stadiums turned into parking lots. I sat alone, rewatching every men's 100m race from 2026 to 2026, building my own tables of reaction time, flight time and speed at 30 metres. What I found was not a champion, but a young athlete with a strong acceleration phase who had never been named because he had no international result.

That experience taught me that data does not emerge from big events by itself. It emerges when someone agrees to sit down and count.

In Vietnamese volleyball, that someone is usually a spectator.

On forums, fans build their own round-by-round tables, counting Bui Thi Nga's successful blocks or Nguyen Thi Kim Lien's first-pass rate. The work is meticulous, exhausting and entirely unpaid. It also cannot become a standard, because two fans count in two different ways, and no one has the authority to say who is right.

The result is a paradox: Vietnamese volleyball has more numbers than ever, and less trustworthy numbers than ever.

The consequences do not stop at the stands. In youth teams, the lack of data makes selection depend almost entirely on short tournaments. An U20 player who performs well in a qualifier that is not televised will struggle to be seen, whatever her real numbers are — because those real numbers do not exist anywhere.

For opponent preparation, the gap is wider. Analysing a Thailand or Indonesia national team usually begins by rewatching recent matches and taking handwritten notes. There is no distribution of points by zone, no comparison table of hitter efficiency, no data on serving trends at decisive points. It all lives in the observer's head.

Contrarian angle

At this point the natural reflex is to call for importing an international analysis system, hiring specialists, buying software, and filling those twelve columns.

I am not sure that is the right road.

At SEA Games 29, the silence of the stands was a lesson about the weight of belief.

What I learned from standing too close to the track was not that more data is needed, but that we need to know which data is missing and why. A spreadsheet crammed full but filled with assumptions is more dangerous than an empty one. An empty cell at least tells the truth that it is empty.

The global sports-analytics industry has shown this repeatedly: when a set of metrics is applied to a volleyball culture with a different rhythm, conditioning base and coaching method, the conclusions drawn tend to detach from what happens on court. The analyst sees a number. The coach sees a player losing confidence after three straight blocks. The two talk about the same event and fail to understand each other.

The tacit knowledge of Vietnamese coaches — built over thousands of hours of watching, thousands of corrections of technique — is a form of data that cannot be written down. It lives in no spreadsheet. If a new system arrives declaring that only spreadsheets are truth, that system will destroy more than it builds.

The worry is not the empty cells. The worry is someone deciding to fill them with guesswork and calling it analysis.

Takeaway

Vietnamese volleyball does not lack people who can count. It lacks an agreement on what to count, how to count, and for whom.

Every transfer is a farewell named hope.

But before transfers, before comparing one foreign signing with another, there is a smaller, harder task: keep the assistant's paper notebook, enter it into the machine, and publish it.

If a volleyball nation will not say out loud what it does not know, it will keep believing what it wants to believe.