Vietnamese Table Tennis and the Empty Spreadsheet: When the Data Is Missing, the Analyst Stays Silent

I opened the spreadsheet at 11 p.m. Forty-seven columns. Not a single row of data.

The first column said "serve placement." The twelfth said "point-win rate across the first three shots." The thirty-first said "transition time from defence to counter-attack." Forty-seven columns stretched across the screen, enough to reconstruct a table tennis match from the opening serve to the final finishing stroke. It had taken me six weeks to design that framework.

Then I opened it to load the data, and realised I had nothing to load.

That night I understood something simple: an analytical tool does not manufacture data. You can draw a perfect framework, a nine-dimension system, a twelve-layer heat map, but if nobody records where the ball leaves the racket face, all of it is an architectural drawing pinned to a wall. Every hand-drawn diagram is a story the numbers cannot tell. But a hand-drawn diagram also needs someone willing to sit long enough to draw it.

A sport rich in results, poor in memory

Vietnamese table tennis has a paradox of its own. Regionally, the country appears regularly at the SEA Games, has players who rank highly within Southeast Asia, and runs a national championship calendar across age groups all year. But ask a simple question — what percentage of points did player X win on the third shot across his last three matches — and almost no answer exists in written form.

In football, the data ecosystem is so complete that people argue over the expected-goals figure of a full-back. In table tennis, even WTT-level events — with prize money, ranking points and international broadcast — supply only a thin statistical layer: points scored, set scores, occasionally the share of points won on serve. Nothing on spin, nothing on placement, nothing on rally tempo.

Domestically, the gap is wider still. Coaching staff record the score. Referees record the score. Spectators remember the score. Nobody records the process that produced it. A player who loses 3-2 after leading 2-0 is remembered as the loser, while the real cause — receive-error rate against sidespin serve spiking from the third set onwards, for instance — disappears with the match.

The consequence is a table tennis culture without technical memory. Players such as Dinh Quang Linh and Nguyen Anh Tu on the men's side, Mai Hoang My Trang and Nguyen Khoa Dieu Khanh on the women's side, have all played matches whose outcome was explained only by retelling, never by data. Each generation relearns lessons the previous one already paid for.

The rules changed; the data never caught up

To understand why this gap matters, look back at four rule changes that shaped the modern sport.

In 2026, the ITTF moved from the 38 mm ball to the 40 mm ball. The larger ball reduced speed and spin and lengthened rallies. In 2026, scoring shifted from 21 points per game to 11, with serves alternating every two points instead of five. In 2026, the ban on hidden serves took effect, forcing players to let opponents see the ball and racket from the toss. In 2026, the plastic 40+ ball replaced celluloid, cutting spin further and changing the contact feel.

Those four changes share one thread: they pushed the sport towards short, high-stakes points. In an 11-point game, each point is worth nearly 9 percent of the set. A player who drops two straight points at 8-8 has pushed himself into a position that is almost impossible to rescue. The value of each point rose, and the smallest error became more expensive.

This is where data stops being a writer's hobby and becomes a condition for survival. When every point costs that much, a small shift in first-three-shot win rate can move an entire career. Suppose a player wins 52 percent of the points on his own serve. That sounds acceptable. But in an 11-point game, to win 11-9 you need 55 percent of the total points. A three-point gap — roughly seven points across ten games — is the dividing line between qualifying rounds and main draws.

The problem is that this gap is only measurable if somebody records it. In Vietnam, the recorder does not exist.

Consider what a table tennis analysis framework actually needs, ordered from simple to complex. The first layer is match data: set scores, point sequences. Almost everyone has this. The second layer is technical data: serve-winner rate, receive-error rate, third-ball conversion rate, rally-length distribution. This layer barely exists.

The third layer is head-to-head data: the record between two players, results by form period, by match-up type. It exists in fragments but is not systematised. The fourth layer is background data: age, layoffs, injuries, training hours, equipment changes. This sits almost entirely beyond outside reach.

Four layers, and we have only the first.

There is another layer I deliberately set aside: equipment. Rubber, blade, sponge thickness, rubber type — these change the feel of the ball in ways no statistic captures. A player switching from a spin-oriented rubber to a speed-oriented one needs anywhere from a few weeks to a few months to stabilise his stroke path. During that window, every metric is noisy. Without a record of when the change happened, an analyst can never distinguish a temporary dip from a genuine step backwards.

I once tried to work backwards. A few years ago, when I first started following table tennis seriously, I sat and re-counted every rally in a domestic match by hand. Three independent counts produced three different totals. Not because I counted badly, but because I had no way to define where a point began and ended when the footage was cut between sets. That was when I understood the problem does not lie with the analyst. It lies with the recording infrastructure.

Look at the region and the difference sharpens. Singapore builds junior programmes with structured pathways and individual athlete files. Thailand runs a steady youth calendar and a data layer thick enough to select national squads on measurable criteria. Vietnam has players, tournaments and coaches, but lacks the recording layer that connects the three. I look at the diagram first, the reputation second. And when no diagram exists, the only thing left to look at is reputation — a method of judgement I do not trust.

The counter-intuitive view: less data, not more

The natural response to a data gap is to demand more data. More camera angles, more statisticians, more software. I believed that for years. I now think it is the wrong reflex.

My forty-seven-column spreadsheet is the evidence. I designed it before I had data, and the result was a tool nobody could use, including me. The failure lay in the order of work: I built the frame before I knew what material I had. For a sport where even recording set scores is not yet a habit, demanding forty-seven metrics is a way of blocking yourself.

What is worth doing instead is choosing three metrics and recording them consistently. They should meet two conditions: one person can record them while watching, and they answer a specific tactical question. Receive-error rate is the first candidate, because it exposes the biggest weakness of most young Vietnamese players. Third-ball conversion rate is the second, because it measures the ability to turn serve advantage into points. Rally-length distribution is the third, because it identifies which group a player belongs to: the one who wants to finish early, or the one who lives on long rallies.

Three metrics, recorded across one season, by one person, are worth more than forty-seven empty columns.

There is another argument I want to put on the table before closing. People often say the data gap makes Vietnamese table tennis underrated. That is partly true. But it is also possible the data gap is shielding players from a pressure they are not yet ready to face: the pressure of being measured continuously, compared week by week, placed beside the unforgiving numbers of the WTT system. I do not think that is a reason to keep not recording. But it is a reason to record responsibly, rather than turning data into a weapon for judging people.

The takeaway

The smallest detail on the table has a reason behind it. Vietnam's table tennis problem in this cycle is not a shortage of talent, nor a shortage of tournaments. It is that we digest results without preserving process. Prediction is an art; data only draws the background — and right now we do not have a background.

If, during the 2026 season, just eight leading players have those three metrics recorded consistently, then by the end of the next SEA Games cycle we will have a genuine technical picture for the first time. I will check that claim myself in twelve months, and if I am wrong, I will write down exactly where I was wrong.