Vietnamese Football Faces Data Analysis Challenge: When Information Is Insufficient, Conclusions Become Lucky Guesses

I have been following football for fifty-three years. Fifty-three years of observing formations shift, recording ball circulation speeds, and learning to distinguish between a beautiful play and a genuine tactical plan. What I have learned over more than half a century is this: people watch players run, but I watch the entire block of formation move. And to see that formation clearly, an analyst needs data — complete, accurate, verifiable data. Without data, every analysis is just a scholarly-looking guess. Last week, I received a match analysis report from a domestic tournament. The writer concluded that Team X lost because of individual errors in defense. But when I asked to review detailed data — pass completion rates for each player, average pressing speed, gaps between defensive lines — I was told the dataset was incomplete. This is the problem Vietnamese football is facing: we want professional tactical analysis, but the data foundation is still too thin. Seven months without football during the pandemic taught me a valuable lesson. With no matches to write about, I spent time compiling a dataset on 0-0 draws from various European leagues. I classified them according to nine different pressing models. When football returned, I had a tool for more accurate evaluation — not intuition, but numbers. That lesson is now more important than ever for Vietnamese football as we try to build professional analysis systems. The core issue lies where? In my match-watching experience, there are three elements that constitute a reliable dataset: completeness, consistency, and comparability. Completeness means collecting enough metrics — not just goals, cards, but also xG (expected goals), PPDA (passes allowed per defensive action), and other specialized metrics. Consistency means the collection method must be the same across seasons and matches. Comparability means data must be standardized to be compared with data from other leagues. Currently, most Vietnamese football statistics only meet the first criterion, and sometimes not even fully. Moscow 2026, when I sat in the East stands of Luzhniki Stadium watching the World Cup final, what I remember is not Mbappé's goal but the space on the right flank that Croatia left exposed after the 35th minute. I remember because I had recorded each player's ball circulation speed throughout the match. To get those notes, I needed a system — cameras, analysis software, and thirty minutes of preparation before each match. This is what Vietnamese clubs currently lack or have not properly exploited. A typical case: a match between Club A and Club B in the 2026 V-League. After the match, media reported that Club A won 2-1 thanks to resilient fighting spirit. But when I reviewed the footage, what I saw was Club B controlling possession 62% of the time, creating 14 shots with 7 on target, while Club A had only 5 shots with 3 on target. Club A won not because of spirit, but because of higher shooting efficiency and some refereeing decisions in crucial challenges. But no one had specific data to verify this, and the "spirit" narrative continued to spread as fact. This is the tactical blind spot I often speak of: when there is no data, people fill the void with emotional narratives. And emotional narratives are easier to sell than dry analysis. An article saying "Player X delivered a brilliant performance" will get more reads than an article explaining that "Player X completed 87% of passes in a 4-3-3 formation with a PPDA of 12.4 — below league average but suited to the counter-attacking defensive strategy the coach demanded." But the second article is what a true analyst needs. I am not an optimistic idealist about Vietnamese football's analytical future. In reality, I see many barriers. First, lack of investment in data collection technology. Vietnamese clubs spend millions of dollars on foreign players but very few invest in ball-tracking systems. Second, lack of specialized human resources. A good football data analyst needs to understand both statistics and football — a combination rare in the Vietnamese labor market. Third, and perhaps most importantly, is the information reception culture. Vietnamese fans are accustomed to "emotional" news more than "data" news. But I also see positive signals. The Vietnam Football Federation (VFF) has begun cooperating with some technology companies to collect data for the national team. Some major clubs like Hanoi FC and SHB Da Nang have hired foreign video analysis specialists. YouTube channels about Vietnamese football tactical analysis are gradually attracting viewers — though the scale is still small. These are seedlings, and they need proper nurturing. So what is the solution? From the perspective of someone who has spent a lifetime observing, I believe three prerequisites are needed. First, clubs must treat data as a strategic asset, not a cost. Investing in data collection systems is not a luxury — it is the foundation for making correct training and transfer decisions. Second, there is a need to build domestic data analyst training programs, possibly through university partnerships or international organizations. Third, fans need to be educated about the value of data — not to replace emotion, but to complement it. My first lesson in football analysis came from a match at Thong Nhat Stadium in 2026. I still remember that at the time, people had nothing but paper and pen. But an elderly coach still sat in the back rows of the stands, recording each play. He told me: "If you want to understand football, you must see what others overlook." Fifty years later, I still remember those words. And I am still trying to see what others overlook — but now, I have slightly better tools: data, numbers, and systematic analysis methods. Vietnamese football is at a crossroads. We can continue analyzing with emotion and intuition, or we can start building a solid data foundation. The choice belongs to no one person — it belongs to the entire football ecosystem, from the federation, clubs, coaches, players, to the fans. And I, with fifty-three years in the profession, can only pose the question and wait for answers from practice. Because ultimately, football never retires — and those who love it will keep learning, no matter their age.