Why Badminton Still Lacks a Single Metric Strong Enough to End Every Argument

In May 2026, in Bangkok, the Badminton World Federation (BWF) held a vote on changing the competition format from three games to 21 points into five games to 11 points. The result was 129 votes in favour and 123 against. The proposal fell short of the two-thirds threshold and was shelved. The three-by-21 format, introduced in 2026 alongside the rally point scoring system, remains in place today.

What made me stop at that meeting record was something else. Both sides talked about "excitement", "technical depth", "broadcast value". Almost nobody offered a measurable yardstick. One side insisted 11-point games make matches more dramatic. The other insisted they dilute skill. Neither presented data. Seven years later that argument still has no ending, and it exposes a gap far larger than the format itself.

I work with badminton data from Surabaya, where every weekend evening the whole city talks about badminton the way Vietnamese people talk about football. In Indonesia this is the national sport in the truest sense. Greysia Polii and Apriyani Rahayu delivered the Olympic gold medal in women's doubles at Tokyo 2026, Indonesia's first gold in an Olympic women's doubles event. But when I open the official statistics page of a BWF World Tour event, what I get is: points won, errors, fastest smash, longest rally. That is descriptive data. It is not explanatory data.

Football has xG, PPDA, progressive passes per 90 minutes. Football fans can argue about a striker using four metrics. Badminton cannot. We know Viktor Axelsen won Olympic gold at Tokyo 2026 and Paris 2026, but we have no standard metric to say how he won, or how that differs from Kento Momota's 2026 season, when the Japanese player took 11 titles in a single year.

Vietnamese badminton fans live inside the same gap. Nguyen Tien Minh once broke into the world's top five, and for more than a decade he was almost the entirety of Vietnam's elite badminton. When he moved past the peak of his career, the question "who is next" was answered with Nguyen Thuy Linh. But we have no way to quantify the distance between those two generations. We only have a feeling. A feeling is a good starting point, not a destination.

Based on my experience watching matches both in Indonesian arenas and on recordings of events staged in Vietnam, I have noticed one thing: fans in both countries ask exactly the same questions, and not one of them has a tool to answer.

Before discussing the missing metrics, it is worth stating clearly what is being mispriced. The 5x11 versus 3x21 argument is in essence an argument about variance distribution. The shorter the game, the fewer the points, the smaller the sample, the greater the variance. At 11 points, a weaker player has more chances to win. At 21 points, the stronger player's win rate rises. Choosing a format means choosing whether the sport rewards skill or rewards luck. BWF has published no simulation model for that question. If it had, the 2026 vote would have been held on data rather than on the instincts of member federations.

The crux sits here: badminton does not lack data, it lacks data in the right place. We are very good at measuring what is easy to measure, and we barely measure what decides results.

Take workload. In a three-game men's singles quarter-final, a player can cover more than 6 km in total distance, with hundreds of changes of direction and dozens of jumps. BWF does not publish cumulative weekly load. So when Kento Momota collapsed after 2026, we told the story through a traffic accident and through a pandemic, two real variables, but with no number showing how far his body had been worn down across a 2026 season of 11 titles. I have written about that period many times. Every time, I had to end with the word "perhaps". For a player who once dominated absolutely, "perhaps" is a poor conclusion.

The pandemic taught me that data also knows fear — when the world stops, numbers become meaningless. In 2026, when tournaments were postponed and the calendar was compressed, every form model lost its value. Badminton was no different. Players returned from the interruption with completely different fitness and rhythm. No column in any statistics table records "time not competing", and so every comparison between before and after limps.

Then there is the Instant Review System, which viewers habitually call Hawk-Eye. This is where the paradox of technology in sport becomes clearest to me. Badminton brought technology in to reduce disputes, and the result was that disputes moved from the line judge to the screen. The line judge argues with the crowd. The screen argues with no one, but it pushes disputes into a new grey zone. A shuttlecock is not a sphere. It is half a sphere with a feather skirt. On contact with the court surface, the feather skirt deforms. Cameras reconstruct the trajectory, while the actual point of contact depends on the angle of approach and the softness of the feather skirt at that exact instant. I have sat through dozens of reviews and asked myself: what exactly are we verifying?

That is why I never say technology eliminates controversy. It moves controversy from the court to the review room, and from plain rules into the grey zone of rules. The same thing happened with VAR in football, and it will keep happening in any sport that still believes a sufficiently high-resolution camera can replace a sufficiently tight rule definition.

The layer few people measure but which decides long-term results is the coaching system. I grew up in China and work in Indonesia, two great badminton nations with two opposite philosophies. China builds on a centralised model, early selection, enormous training volume, collective discipline. Indonesia builds on a club model, with players raised on local courts in Kudus or Surabaya, playing on instinct and fed by the feverish atmosphere of home crowds. Both produce champions. Put the two nations' honour rolls side by side and you will not see that difference. You will only see medals. Medals say nothing about method.

Numbers are the prayer beads, but intuition is the candle — I light both whenever I read a match. With a women's singles player, I usually start by watching the first game without writing anything down. Only then do I break the data down by court zone: how often she was pushed behind the back boundary, how many rallies she won in the front half, her win rate in rallies lasting more than 15 shots. Only when the zone picture matches my opening impression do I allow myself to write. If they contradict each other, I write about the contradiction itself.

That lesson cost me dearly. In 2026 I used a model built on expected goals to advise the club I worked with to push its line high in a promotion play-off. The model predicted my team would generate 1.8 expected goals. In reality they lost 0-2, because the opponent sat deep and every shot we took was a harmless effort from long range. I had not checked the pressing metric or the origin position of those shots. The model was not wrong; I was wrong to let it speak instead of my own eyes. Badminton will be the same if one day we get an xG model for it, and then forget that the shuttlecock deforms when it touches the court.

There is one more layer that few analyses touch: the industrial current around the sport. Three major brands — Yonex, Li-Ning, Victor — do not merely sponsor tournaments, they shape the calendar itself. A BWF World Tour event carries prize money, ranking points and broadcast contracts; players choose events by weighing points against travel distance. Vietnam's badminton events, typically the Vietnam Open, sit in a lower tier of that system, which means Vietnamese players must travel abroad to accumulate points more than peers in Malaysia or Thailand if they want to rise. That cost appears in no technical statistics table. It sits on the invoice.

There is one category of badminton data I always read with suspicion: smash speed. Tan Boon Heong's 493 km/h record from 2026 is an impressive number, and every time a tournament announces its fastest smash, it spreads instantly across social media. Ask yourself: how many of those turn into points? A 400 km/h smash that lands on an opponent's racket in a comfortable position is worse than a 250 km/h placement that drops into the gap between two players. We are measuring what is most exciting to watch, not necessarily what is most decisive to winning.

This is the classic trap: correlation is not causation. A champion often owns the fastest smash of the tournament, but he wins because he moved to the right spot at the right moment to unleash that smash from a balanced position. Speed is the result. Position is the cause.

This also explains why I rarely trust badminton player valuation tables. The sport has no transfer mechanism like football; most players compete for national teams or hometown clubs. A valuation table built from title counts will always rank a player who enters many events above one who enters few but is more effective each time out. A player's true value lies where he runs and when he stops. A ranking table cannot measure the moment of standing still — the moment a player chooses not to move in order to hold position, something anyone who watched Nguyen Tien Minh at his peak recognised without any number to describe it.

If BWF genuinely wants to close the 5x11 argument, it needs to publish a simulation model of how the format affects win-rate distribution, alongside weekly workload data and a court-position quality metric. Otherwise every general meeting will again be an emotional vote, and every generation of Vietnamese badminton will again answer the question "who is next" with belief instead of evidence.

I still keep the habit of watching first and asking later, and I am still waiting for a season in which people argue about a player using the same language of data they use to argue about a football striker. I only hope that when that day comes, we still remember that the shuttlecock deforms when it touches the court. If we forget, the model will once again speak in place of our eyes.