An Empty Data Sheet and Why I Refused to Write About That Match

2:17 a.m., Chiang Mai. I sat in front of four video tabs open in parallel, a notebook with a sketched rotation lying tilted against the keyboard, and a spreadsheet file gaping empty. The match had ended seven hours earlier. On social media, thousands of people already had their conclusions: they blamed the libero, the coach, an exposed set. I sat there, scrubbing back to the twelfth second of the very first rally, and the only thing I was certain of was that I did not have enough data to write a single line.

That was not the hesitation of an inexperienced writer. It was a professional decision. Across thirteen years of watching volleyball — from commentating table tennis World Cups and badminton Sudirman Cups to moving fully into volleyball tactical note-taking — I learned one thing more costly than any analytical skill: the hardest part of this job is not reaching a conclusion, but knowing when to refuse one. An empty data sheet is not a shame. The shame is looking at that empty sheet and still writing three hundred words full of adjectives.

This article tells that story — a tactical writer standing before a volleyball match where every parameter lay beyond verification, and why I chose to say "not enough data" instead of inventing a good story.

Context: an industry that concludes before it measures

Volleyball media today runs on what I call the conclusion rhythm. The match ends, the whistle has not faded, and someone has already posted. Within thirty minutes, the platforms are full of fully structured judgments: who hit poorly, who carried the team, who ruined the match. The problem is that most of those judgments are built on a single kind of data — the score and a feeling — while volleyball is a sport with at least nine layers of information stacked on top of each other.

I learned this in a summer in Germany and Mexico in 2026, when I was a sociology master's student and spent the entire break redrawing formation distances from group-stage matches. I noticed a strong national team losing dozens of dangerous transition phases in a single half, with an average distance between the central defenders and the holding midfielder of over thirty metres. I wrote a piece longer than three thousand words, and it was translated into Spanish. But my biggest lesson was not in that piece. It was that I nearly wrote a different one — blaming the defence — before I had measured anything.

When I moved to volleyball, that principle became my spine. Volleyball viewers tend to watch the ball: who spikes it, where it goes, who hits the floor. I watch the space behind that ball — the gap between the libero and the wing, the gap the reception system leaves when one passer has to retreat half a step, the gap in the rotation diagram when a team gets stuck in a rotation it cannot escape for a whole set. You watch the ball; I watch the space behind it. But to see the space, I need the number. That night, the number was not there.

Layer one: tactics and technique

The first layer is the one viewers think they understand best, but is in fact the hardest to establish. It covers the attacking system, the rotation diagram, the reception positioning, and the entire tactical menu a team can open up in each rally.

How many tactics a volleyball team can open depends on the quality of its first pass. If the passer delivers a perfect ball to the ideal position, the setter can run the whole menu: quick middle, short ball, back-row attack, cross-court hit. If the first pass only reaches an average level, the setter must narrow the options, and the opponent only needs to wait in one corner. This is why I always start by measuring the perfect-pass rate, not by praising the spiker.

In that match, I had video but no standard technical sheet. The software used widely in professional circles — Data Volley — gives me exactly what I need: who touched the ball, from where, with what result, and what the lineup was at that moment. Without it, any tactical observation is just a decorated guess.

The first layer of my analysis was empty.

Layer two: data

Volleyball has five core indices any serious analysis must capture: spike efficiency, blocks per set, ace-to-error ratio, perfect-pass rate, and dig rate. These are not merely numbers; they are five answers to five different questions. Spike efficiency answers whether a team's attack is genuinely effective or merely busy-looking. Blocks per set answers whether the net defence reads the opponent's intent. Ace-to-error answers whether a team is applying pressure or giving away points. Perfect-pass rate answers whether the reception system gives the setter enough room to steer. Dig rate answers whether the back-court defence survives the hardest attacks.

When all five are missing, I cannot distinguish a team that lost because of weak attacking from one that lost because its reception system collapsed. And that difference is not small. It is the difference between a coaching problem and a personnel problem. Between a tactical error fixable in a week and a gap that takes a season to fill.

Layer three: competition system and schedule

Volleyball demands constant jumping. A five-set match can mean hundreds of jumps for one spiker. At high schedule density, jump height drops, and spike efficiency falls with it — not through technique, but through energy. There is also the league-versus-national-team conflict. A player competing in a domestic league who must then join the national team for an international event often gets only a few transition days. Without a timestamp, every claim about schedule pressure is a guess — and schedule-pressure guesses are the most dangerous kind, because they sound so plausible.

Layer four: landscape and team positioning

I always place Vietnamese volleyball next to Thai volleyball, but not to compare medals. I place them side by side to study their operating cultures. Thai volleyball has a youth-development system that has produced successive generations playing abroad; Vietnamese volleyball has talented cohorts but structural gaps in the transition between federation, club, and national team. When analysing a Thai team, I always force myself to list at least three cultural differences before applying any template.

Layer five: rules and governance

One of the most important procedures in international transfers is the ITC — International Transfer Certificate — managed by the international federation, allowing a player to move from one federation to another. Without an ITC, a player cannot officially compete for a new club, no matter what contract was signed. I hold one rule: I never infer a compliance problem merely from the existence of a news item. A report being written does not mean a violation occurred.

Layer six: team building and personnel management

A volleyball team's age structure determines its window of success. A team with several spikers at their peak can compete immediately. A team in generational transition needs two to three seasons to stabilise. I judge a team not by results but by the thickness of its bench. Without names, I can assess nothing at this layer. Team analysis without people is the analysis of a number without content.

Layer seven: the risk surface

Volleyball carries seven main risk categories: competitive, personnel, schedule, rules, public opinion, systemic, and one I call analytical risk. The biggest risk I faced that night was not among the first six. It was the seventh: the risk that a writer creates an image of a team, the reader believes it is fact, and then acts on it. A goal is never born in the 89th minute. In volleyball, a lost set does not begin at the final deciding rally. It begins in a rotation the team cannot manage, in a first pass placed wrongly, in a substitution made ten minutes late.

Layer eight: public narrative and expectations

The public narrative about women's volleyball in Vietnam and Thailand is especially strong, because it is tied to symbols beyond sport. I always check three things before joining any narrative: what event foundation it rests on, whether the sample size is enough to conclude, and how long the narrative can survive.

Layer nine: industry transmission

A volleyball event travels through a transmission chain: from the youth talent supply, through leagues and national teams, to broadcasting, commerce, and related industries. A player's career is shorter than in many sports, yet post-retirement training and transition support barely exist in Southeast Asia. In sports business, a club's entry into capital markets turns fan emotion into money, and financial-reporting pressure often presses down on sporting decisions.

The contrarian angle: why an empty result has value

An honest empty result is worth more than one stuffed with fabricated content, because an empty result produces no false consequences. Media rewards the loud voice. A fast writer with a clear conclusion gets shared; a slow writer saying "not enough data" is seen as having no opinion. In the short run, the structure wins. In the long run, it produces a public fed on judgment while understanding nothing about the sport they watch. And here is what I learned from data analysis itself: the value of an integrity check is not in producing results, but in preventing wrong ones.

Takeaway

I hope that in the coming years the writers of Vietnamese and Thai volleyball will dare to say "not enough data" without fearing they will be seen as ignorant. A mature volleyball culture is not measured by medals. It is measured by whether its public can tell an assessment from a rumour. As for that match, I still keep it in my notebook — not as a match I missed, but as a lesson I recorded: there are matches where the correct way to write is not to write. I will sit down again for the next one, open the video, and take notes. If the data is enough this time, I will write. If not, I will close the laptop and go to sleep. That is the whole job. There is nothing glamorous in it. Just a person sitting and measuring, and a notebook that never lies.