When Sports Data Gets Stolen: A Table Tennis Writer's Perspective

I sat in the stands at a youth table tennis tournament in Ho Chi Minh City, holding a notebook with a worn spine, eyes fixed on the electronic scoreboard. A 17-year-old player had just lost the fourth set 11-9. He walked off, wiped his face with a soaked towel, then pulled out his phone. Within three minutes of sitting down, he had looked up who his next opponent was, which hand they played with, their home-court win percentage, and the serves they typically used in 9-9 situations. I wondered: how much of that did he actually understand, and how much was pre-packaged data sold to some betting company he knew nothing about? That was the moment I decided to write this piece. Not about a specific tournament, not about a famous player. But about something quietly changing how we understand sports — and possibly changing how sports itself operates. Twenty-eight years ago, when I started as a fact-checker at a sports magazine, every number had to pass through my hands at least twice. I remember nights hunched over a desk, cross-checking every point column from a regional tennis tournament against the organizers' original records. One wrong digit, and the whole article had to be redone. That discipline followed me throughout my career, and it taught me one thing: sports data doesn't exist naturally. It is created by people, verified by people, and — most importantly — used by people. But now, sports data has become a commodity. Every serve, every spin, every movement of a player is recorded, analyzed, and sold. Not sold to coaches. Not sold to journalists. But sold to betting companies, to platforms that monetize every second of competition. Look at table tennis. This sport has a special advantage few recognize: speed. A top-level rally lasts an average of 3 to 5 seconds. In that time, a player must process information about spin, placement, opponent's posture, and make a decision in under 0.2 seconds. That's why table tennis is considered the sport with the highest decision density among combat sports. And precisely because of that density, table tennis data is extremely valuable to automated analysis systems. I have spent years covering major tournaments, from the Table Tennis World Cup to regional youth events. What I have observed is this: the gap between those who understand data and those controlled by data grows wider every day. A youth team coach in a provincial area may spend weeks gathering information about opponents at a national tournament. Meanwhile, a data analytics company abroad can have that entire profile within hours of the tournament ending — or even while it is still underway. This is not a story about technology. This is a story about power. When data becomes an asset, those who hold data hold the power to shape how sports is understood. A player may train 10,000 hours to perfect a spin shot, but if data about that shot is analyzed and sold to opponents, those 10,000 hours can be neutralized in a single afternoon. I don't say this to be pessimistic. I say it so we look directly at a reality: every combat sport is entering an era where information is no longer an advantage — information is a weapon. And in table tennis, that weapon is being used with very few people noticing. Consider a specific scenario. A young Vietnamese player competes internationally for the first time. He has little data about himself on international platforms. His opponent — a player from a country with a strong analytics system — already has a profile on him, even though they have never met. Where did that profile come from? From domestic tournaments he participated in, from videos posted on social media, from recorded training sessions. All of it collected, analyzed, and synthesized into a detailed report on his weaknesses, strengths, and even his smallest habits. This is not fiction. This is how many national sports federations operate. And in table tennis, where the skill gap between top countries is measured in mere percentage points, information advantage can be the deciding factor between winning and losing. I remember sitting next to a youth team coach at a tournament in Southeast Asia. He told me: "I know my student didn't lose because of technique. He lost because the opponent knew what he was going to do before he did it." That statement made me think deeply. In table tennis, reflexes are a matter of survival. But reflexes only work when the opponent hasn't predicted the ball's direction. When data allows opponents to predict, reflexes become meaningless. That's when I realized: sports data is not just a tool. It's a power game where the smallest players — young athletes, lesser-known teams — often have no seat at the table. So what should we do? I don't have a simple answer. But I believe the first step is awareness. We need to understand that every time a player steps onto the court, they are not just fighting the opponent in front of them. They are fighting an information system that may already know more about them than they know about themselves. And in table tennis, where everything is decided in seconds, that understanding can be the difference between a career and a missed opportunity. I still keep that old notebook. The numbers in it were written by hand, checked by hand, and understood with the heart. Perhaps that is something data can never replace — and also something we need to protect, before it gets sold along with the other numbers.