When Vietnamese Tennis Data Remains a Void

On Tuesday evening, I stood beside a tennis court in Ho Chi Minh City, watching a 17-year-old player serve. I opened a data app on my phone to find information about him, but the results came back empty. There were only a few scorelines from regional tournaments, no percentage of first serves made, no return-game winning percentage, nothing. That reminded me of an analytical report I had received the day before. A report about the potential of a Southeast Asian player, but every metric read "insufficient information", "cannot assess". Reading that report, I felt like I was looking at a painting scraped blank, where everything was vague. It was not a reflection of the weakness of the analysts, but a spotlight on the poverty of Vietnam's sports data system. Since I was a young reporter following the Vietnam U23 team in 2026, I witnessed the stands explode in the 119th minute, but I also saw long nights where no statistics were recorded other than the final score. Fans need golden trophies, but they also need a reason to sing together on the streets. And that reason often begins with numbers that speak. But in tennis, the story is even more unfortunate. Ly Hoang Nam, Vietnam's No. 1 tennis player, once reached a world ranking of 365 in 2026. That is a proud milestone, but we have no data to know how he did it. How many points did he win at the net? What was his second-serve percentage in decisive games? How did he handle pressure in tie-breaks? No one knows. We only have his record and some short video clips, but no system tracks his performance to help him improve. I remember in 2026, when the pandemic silenced stadiums, I began building a database for a local football club. I spent months reviewing match footage, manually recording every ball touch. When the stands stopped talking, I listened to the pitch through xG and saw that data could vibrate. I discovered things invisible to the naked eye: that team scored only 0.7 goals per match when playing away without fans, but 2.1 goals per match after the restart with fans. That statistic told a story about psychology that no fan could express in words. But when I tried to do the same for tennis, I hit a wall: domestic tournaments have no statisticians, no dedicated cameras, and not even a unified standard to define a winning forehand. A friend who works as a coach at a sports center in Nha Trang once told me: "We don't need data, because we see our students' mistakes with our own eyes." I respect that, but I disagree. The naked eye can only see speed; it cannot analyze 200 shots in a three-hour match. Changzhou that year taught me that some heartbeats do not need goals to echo far. That heartbeat cannot be measured by the score, but by how we feel the shift of momentum minute by minute. When a young player like Nguyen Van An – I will not use his real name – enters a national youth tournament, no one can track his development trajectory. He wins two matches in qualifying, but no one knows whether he won thanks to his serve or his net play. If he goes to an academy abroad, the coaches there will ask for a full statistical breakdown, but we have none to offer. He enters an international tournament and loses early in the first round; we blame his fitness, but the truth is he did not have enough data to build an appropriate strategy. There is a misconception that live television is a source of data. It is not. Cameras only record images, not intentions. A successful drop shot may seem spontaneous, but if data shows he only attempts it after eight long rallies, you understand his tactics. In Grand Slams, the ATP Insights system provides hundreds of metrics, but when we look at domestic tournaments, we return to the pre-technology era. This deficiency does not only affect national team players but also children who practice daily in private clubs. They do not know their strengths and weaknesses, and when they step into the international arena, they are surprised to be figured out in the first set. In 2026, I followed a SEA Games in the Philippines where Vietnam's tennis team won some medals. When I asked a coach about specific tactics, he said: "We rely on intuition." Intuition is important, but it cannot replace the analysis of opponents through data. Fans do not need golden cups; they need a reason to sing together on the streets. And that reason might come from a statistic showing our player ran 4.2 kilometers in a match – a number never measured before. Compare this to football, where even lower-tier teams have someone in the stands recording pass counts. Tennis in Vietnam still relies on multi-tasking coaches who both instruct and do the statistical work. They lack the time and tools. A coach must focus on the technique of each student in a group of ten, so data collection becomes a luxury. And when data does not exist, sponsors have no basis to invest. They want to see a player's progress through numbers, but we can only tell them about victories in minor tournaments. I recall a quote from famous statistician Nate Silver: "The more data we have, the more we realize how much we don't know." In Vietnamese tennis, the opposite is true: we have no data, so we think we know everything. Parents with kids in training believe their children will succeed because they hit the ball hard, but a single strong shot is never enough to qualify for Roland Garros. The lack of data makes us falsely optimistic, and when failure occurs, we cannot identify the exact cause. That Euro summer had no spectators, but Hanoi's balconies were packed with TVs and hearts. With tennis, we do not have such communal viewing sessions because we do not even have an international tournament big enough to ignite passion. And in that darkness, young talents quietly fade away. A few years ago, when I wrote an exclusive story about a young midfielder's contract, I relied on data I had collected over many seasons. Agents trusted my numbers because I could back them with statistics. But with tennis, I cannot do the same. I cannot claim a certain young player deserves investment because I have no way to quantify their talent beyond watching them play with my own eyes. That makes me feel powerless. One beautiful afternoon, I sat in a café in Da Lat and attempted to build a small data set for a local amateur player. I used two phones to record a match and manually counted his forehand winners. The result showed he successfully hit 78% of his forehands, but when facing a left-handed opponent, that percentage dropped to 45%. That indicates he did not know how to handle left-handed spin. He had been playing for ten years but had never realized it. With a national data system, such weaknesses could be detected early and corrected. When the stands stop talking, I listen to the pitch through xG and realize data can vibrate. In tennis, the same phenomenon occurs. Numbers about return-game percentage, shots hitting the line, or successful net approaches are all stories waiting to be told. In Vietnam, we have no storyteller for this sport. We let our talents drift in an ocean of information without a positioning buoy. Perhaps the greatest irony is that tennis is one of the most filmed sports at major tournaments, with Hawk-Eye and smart sensors. But in Vietnam, we treat this sport like a medieval team game, trusting only instinct. Federations need to ask themselves why they have never built a database for national tournaments. The cost is not enormous; a tablet and a simple software suffice. But perhaps the biggest resistance comes from mindset: people believe counting numbers is the job of scientists, not athletes. I want to change that. I am no longer a junior reporter; I have spent ten years observing sports, and I see that Vietnam's football progress in the past decade has had a quiet contribution from young data analysis groups. They are not celebrated like players, but they produce tactical reports used by national teams. Football has advanced thanks to data, while tennis is falling behind. Looking at young players at academies in Ho Chi Minh City, I see potential no less than their peers in Thailand or the Philippines. But Thailand already has its data system, built from youth academies. They know how many returns a 14-year-old needs to transition from regional level to continental level. Vietnam needs a revolution in data thinking. I do not want to end this article with a vague call to action. I want to say something specific: when a young Vietnamese tennis player plays in an international tournament, I want to have four numbers in hand: service-games won percentage, return-games won percentage, double-fault ratio, and break-point conversion. With just those four numbers, I can predict their chance of winning with over 70% accuracy. Currently, I do not have those numbers, and therefore I can only say: I believe in their talent. And that belief is not enough to take them to Grand Slams. I still hope that one day, a young developer will build a statistics app for Vietnamese tennis. I offer my help, even with my small fanpage. Every rhythm will eventually slow down. And not every beat needs to be fast. But we must start. The development of Vietnamese tennis does not require an immediate miracle, but a data foundation so that miracles can occur in a controlled manner. If you are reading this and you are a software developer, I invite you to build that database with me. If you are a coach, start taking notes today. We may not see results immediately, but after five years, today's children will know exactly how far they have come. That is the most precious gift we can give to the future generation of Vietnamese tennis.