Vietnamese Volleyball and the Data Problem Before the Major Season

At two in the morning, the data file opened in front of me. Five rows sat neatly side by side like five staves of music: spike success rate, blocks per set, ace-to-error ratio, perfect-pass rate, dig rate. All five rows were empty — a silence, the kind of silence I used to hear in gymnasiums at five in the afternoon, when the coach switched off the whistle and let the players listen to each other breathe. A young colleague had attached one line: “Please analyse this match for me.” I did not answer straight away. In more than thirty years in this trade, I have learned one thing: the most dangerous act is inventing numbers to fill a blank page.

The major season is close, and Vietnamese volleyball is living through the most taut stretch of a cycle. The national championship has closed. The national teams have entered their accumulation phase, rebuilding line-ups. Fans are already arguing about starting spots before any roster is announced. That pressure lands on the newsroom: every match needs a piece within twenty minutes of the final whistle, every piece needs a conclusion, every conclusion needs statistics attached.

At international level, volleyball statistics is a profession of its own. Every rally is coded: type of pass, attacker position, ball direction, quality of contact, final outcome. A single set can generate several hundred data rows, enough to reconstruct an entire rotation. At home, most numbers are still collected by hand — one or two people sitting courtside, writing on paper, transferring into a spreadsheet afterwards. That method is not bad at all, and the people doing it deserve far more credit than they get. But it carries a fatal weakness: when resources run out, the gaps get filled with memory, and memory always favours the winner.

So an empty table is an everyday occurrence. Few people are willing to say so out loud.

To me, a volleyball match is a piece of music with several layers. The bass layer is the reception system — the thing nobody remembers after the match, yet it decides everything happening above it. The middle layer is the rhythm of rotation control, where the setter chooses tempo and destination. The top layer is the finishing spikes, the only part that makes the evening bulletin.

Perfect-pass rate measures the share of first contacts delivered to the ideal position, allowing the setter to open the full attacking menu: quick middle, high outside, back-row, the pipe from position one. When that rate drops, the opposing block only has to guard two threats instead of four. That is why people inside the game keep talking about the two-attacker rotation: the rotation where the opponent can almost read who will attack, and from where.

When the first pass breaks down, the team falls out of system. The ball is pushed to the wing, the setter has to run, and the attacker solves the problem with individual skill. In that exact moment, individual numbers go up while collective tactics go down. An attacker like Tran Thi Thanh Thuy or Nguyen Thi Bich Tuyen can rescue an out-of-system ball with jump and reach, and the stat sheet will record one more successful spike. It will not record that the rally was born from a reception error.

I once compared a setter to a jungler: both live in the stretch of time the audience cannot see, and both are judged by rallies that other people finish. That comparison earned me plenty of criticism. It also helped a generation of younger viewers understand why the second contact matters more than the final spike.

Across twenty-two consecutive years of commentating volleyball finals live, I have sat close enough to the court to see what a stat sheet never records: the libero shifting half a step before the opponent serves, the setter lifting the hands higher on the third tempo, the middle blocker closing the hands exactly half a beat late. Watching a victory is easy; understanding the sleepless nights requires an epic.

An empty data table is not the end of analysis. It is a signal that the writer is asking the wrong question.

Without a perfect-pass rate, I still have three layers to read. Structure: where the team stands before the ball is touched, who covers whom, who abandons position early. Rhythm: whether the pauses between rallies are long or short, whether the setter speeds up or slows down after winning a point. People: who touches a teammate's shoulder after an error, who turns their face away.

Those three layers cannot replace statistics. They only keep the writer honest while waiting for the statistics.

There are two ways to dodge the real work of analysis, and both are widespread. One is data worship: whatever cannot be measured is treated as if it does not exist, and whatever is measured is treated as automatically true. The other is intuition worship: the writer trusts their own eye so completely that they never check it, turning personal impression into gospel.

Most of what passes for volleyball analysis here is a retelling of events in adjectives. Team A played brilliantly. Team B lost their spirit. Player C is out of form. Those sentences are not wrong, but they cannot be verified, cannot be reused, and teach nobody anything.

In the other direction, a table packed with numbers can still be meaningless. A forty-five per cent spike success rate against a weak block says little about how strong an attacker really is. To read it properly, you need to know who the opponent was, what stage the match was at, whether the team was still hiding its cards or had shown everything. Context is what turns raw data into understanding.

A dark map has no lamps, but the sentry still lights a fire. The analyst's job is the same: when there is no light, you strike one yourself, and you state clearly how far it reaches.

At fifty-five, I no longer care about appearing to know everything. Age is only a number; an epic is written in blood and ink. What matters to me is that an eighteen-year-old reader finishes my piece and understands why her team lost — through an explanation she can verify, not through a consolation.

One detail is worth noting: the strongest teams in international competition rarely hide their data. They publish it, letting opponents read, because they believe knowledge cannot be copied without the same development system. Here, data is often kept back like merchandise, when the thing worth keeping is the method.

Even a name as established as Nguyen Thi Ngoc Hoa was once questioned purely because of age, while what she gave her team lived in blocking position, in reading the opponent, in rallies that never appear on a scoreboard. A volleyball culture that measures only attacking output will always misjudge the worth of people like her.

I still keep that empty file on my machine. Not to remember a failure, but to remember that every major season begins with a blank page. At fifty-five, I am still looking for maps nobody has printed — and for matches nobody has fully understood.

When the final whistle sounds and the table is still empty, an honest writer can choose to say: “I do not know yet.” The question is whether, in a volleyball scene growing this fast, we have the patience to wait for the answer to come from the recording room rather than from a status update.