A Coach's Notebook and the Data Void in Vietnamese Martial Arts

The fight night at a small arena south of Incheon ended close to midnight. A Vietnamese fighter won on points after three rounds, two judges raised his hand, and the crowd of about two hundred was mostly compatriots who had taken a two-hour bus down from Ansan. No statistics sheet was handed to the press. No official record was uploaded to the promoter's page afterwards. The only person who wrote anything down was a 58-year-old coach, filling a spiral notebook with a broken spine: date, opponent's name, number of rounds, area of injury, purse. I asked him who he kept the notebook for. "For him," he said. "One day he'll have kids, and he'll have something to tell them."

The locker room does not lie. Only outsiders need to embellish. But when the locker room refuses to keep records, outsiders write whatever they like. That was the thought that stayed with me on the bus back into the city, with only a scrap of paper in my pocket listing the records of six fighters.

Context: results are counted, people are not

Vietnamese martial arts presents a paradox that anyone covering the sport sees clearly. At the level of results, everything is counted. At SEA Games 31, hosted in Hanoi in 2026, Vietnam's delegation won 205 gold medals, with combat and martial arts disciplines — karate, taekwondo, judo, wushu, vovinam, pencak silat, boxing, kurash — taking a large share. The medal table is exact, down to the unit.

At the level of people, the data is almost blank. No public national database records individual fight histories: who faced whom, win or loss, at what weight, in which event, in which year. Scorecards from bouts are not released after the final bell. No medical suspension list exists. No cyclical weigh-in records. No contract, purse or exclusivity data between fighters and gyms.

In South Korea, where I live and work, major professional promotions typically publish fighter records, official weigh-in results, and the suspension period after each knockout. A fan can look up a fight from six years ago and know exactly who won which round, on which judge's card. The gap between the two systems is not about skill. It is about the filing cabinet.

A Vietnamese fighter's path usually runs through four stages: a private gym in a province, a provincial team, the national team, and then, if lucky, a professional stage at home or abroad. Each stage keeps its own paperwork. None connects to the next. When a fighter changes gyms, the file stays behind.

Four kinds of paperwork nobody keeps

The individual record is the first thing to disappear. A fighter's record is passed on by word of mouth between coaches, scattered across a few local articles, or held only in the memory of those involved. I once sat with a coach in central Vietnam who recited twelve of his student's fights from memory. Not one had a written record.

Scorecards are the second. In combat sports, the tally is the primary evidence. When it is not published, every dispute moves from procedure to emotion. Fans cannot verify, so they have only two options: believe completely or doubt completely. Both damage the sport.

Medical and weight data is the third, and this is where it gets dangerous. There is no suspension list shared between federations and provinces. A fighter knocked out at one event this weekend can step into a ring in another province three weeks later, under a different organising body, and nobody knows. I have seen that happen twice in the past four years.

Money data is the fourth. Nobody publishes purses, exclusivity clauses or contract lengths. The result is a market where a fighter's value is set by rumour, not by a measurable record.

Matchmaking by rumour

The consequence shows up at the matchmaking stage. A promoter building a card needs to know: who has this fighter faced, what is his style, what is his conditioning, what is his real weight. Without data, they rely on video and word of mouth. Which means the entire scouting and matchmaking system of Vietnamese martial arts runs on personal trust, not on verifiable evidence.

Personal trust has value. But it does not scale. A good coach can only vouch for the students he knows. A gym cannot prove its development record to a sponsor without showing data. The sponsor, in turn, cannot calculate the investment without win rates, average age, or the competitive lifespan of the roster.

What I keep on my laptop

Over nine years covering martial arts and football, I have kept a personal spreadsheet with more than three hundred names: date of birth, weight class, gym, coach, number of bouts, known injuries, last appearance. Most cells are empty, and I leave them empty rather than fill them with guesses. Each week I call two coaches, a former national team fighter and a sports physician. That habit formed during the period when events were held without spectators, when on-site sources vanished and I had to listen to the people least often asked.

What I learned: the data void is not distributed fairly. Fighters in big cities, with managers and media, exist on the internet. Fighters in the provinces, paying their own way, exist nowhere. When they retire, nothing proves they ever competed. Surviving a relegation battle is not about never falling. It is about falling and still counting your breath. For a fighter, being counted is also a form of recognition.

The bottleneck is record-keeping culture, not budget

The familiar explanation for every problem in Vietnamese sport is a lack of money, talent and facilities. I do not deny those three. But the causal order is usually reversed. Money follows evidence. A sport that cannot present its own data struggles to sell itself to sponsors, to broadcasters, to parents weighing whether to let a child go professional.

One uncomfortable thing needs saying plainly: when fight records are not public, the betting market and rumour fill the gap, and they fill it with facts nobody can verify. I have followed esports long enough to see what happens when a discipline has a large audience but its data and governance systems lag behind. In martial arts, the same risk arrives more slowly but travels the same road.

A season is a loop. The person keeping the beat knows when the drum rises and when it goes quiet. Vietnamese martial arts is playing at full volume, which is exactly why the silences in its records are more dangerous than usual.

Signals to watch

Over the next two years, the signals are concrete. A national fighter registry with unified identification numbers, even if only at federation level. Scorecards published within twenty-four hours of a bout. Medical suspension lists shared between provinces. And gyms starting to keep individual files for their students as part of a training contract, rather than as the coach's private business.

When the arena is empty, the only applause left is your own heartbeat. A fighter can live with that. A sport cannot. I have seen grown men cry in the tunnel. Not because they lost, but because they knew it was the last time. The only thing that keeps that last time from being erased from collective memory is a line written on the right date, at the right weight, under the right name.