When a Tactical Report Is Nothing but "Insufficient Data"

When a Tactical Report Is Nothing but "Insufficient Data"

I sat in a meeting room at a training centre outside Marseille on an October morning. On the table lay a forty-page report on the weekend's opponent. Heat maps, running charts, data boxes — everything presented neatly. But when I turned to the conclusion, I read a line that made me freeze: "Insufficient information, cannot assess." The next box said the same. So did the third. Forty pages, in the end, said nothing.

That is no joke. It is the disease of modern football. We have built an entire data industry, hired hundreds of analysts, bought expensive subscriptions, and produced meaningless reports that nobody dares admit are meaningless. That emptiness is more dangerous than ignorance, because it wears the cloak of knowledge.

Context: the report addiction

Within fifteen years, European football shifted from scouts carrying notebooks to the pitch to a world where every decision must have a "data basis". Ligue 1 clubs spend millions of euros a season on analytics platforms. Sponsors demand proof of ROI. Boards demand KPIs. And at the centre of that machine, the analyst becomes someone who must produce a deliverable, regardless of whether it has value.

The result is a paradox: the more data, the fewer real conclusions. When you are forced to submit a report, you will submit it. You fill the empty boxes with safe phrases: "needs more time", "depends on context", "sample too small". It sounds scientific, but it is really a polite way of saying two words: I don't know.

The reader — a coach, a sporting director — is put in a difficult position. They cannot argue with a document that looks professional. They nod, fold it away, then go out and act on instinct. The report becomes a ritual, not a tool.

Core: data does not create meaning by itself

This is what I have learned after nearly thirty years following the game: a number only has value when placed beside an observation, and a report only has value when it dares to make a judgement.

Take PPDA — passes allowed per defensive action. It measures pressing intensity. A low PPDA means aggressive pressing. It sounds scientific. But if you only look at the number without watching the match, you miss the most important question: was that pressing effective, or just disorganised charges that got broken by a single long pass?

Similarly with xG — expected goals. A team with high xG that fails to score is usually explained as "unlucky". But I have sat in the stands and seen the opposite: sometimes high xG comes from long shots in a stalemate, while the opponent needed only one clean counter to win. The number does not lie, but the number does not tell the whole story either. Data takes me to the stadium gate; the eyes lead into the dressing room.

And in the transfer market, where valuation tables are worshipped as truth. One player is valued at thirty million euros, another at fifteen. The number makes people believe value has been measured. But do not look at the price tag, look at the team after the player leaves. Some leave for a fortune yet leave a gap that cannot be filled; some leave quietly and the team collapses. The price tag cannot measure that.

The problem with empty reports is not that they lack data. They have too much. The problem is they lack someone willing to take responsibility for a conclusion. An analyst afraid of being wrong will never write "this team will lose because the midfield is unbalanced". He will write "many scenarios are possible". And so he stays safe — but useless.

Contrarian angle: an empty report is more dangerous than none

Here I will say plainly what many in the industry will not: a report full of "insufficient data" is worse than no report at all. Emptiness presented neatly creates the illusion that the work has been done. It sedates the coaching staff, making them believe every possibility has been considered, when in fact nothing has been decided.

I once watched a club get relegated because of exactly this kind of report. The analysis department produced a thirty-page document on the direct rival, and in it there was not a single specific warning about their own weakness on the left flank. Everything was "noted". Nothing was "concluded". When the match came and they conceded on that very left flank, nobody could say they had not been warned — because the document had "mentioned" it. That is the most subtle betrayal data can commit.

Some will say: better safe than wrong. But in football, the analyst's safety is the team's insecurity. A shock opinion is only worth something when it stands on a detail others overlooked — and conversely, a conclusion willing to take a risk is the one that truly helps.

Where I might be wrong

I must admit: there are moments when caution is right. Early in a season, when the sample is small, saying "cannot yet conclude" is honest, not cowardly. A newcomer who has not played three matches should not be labelled. There, the phrase "insufficient data" is a legitimate warning, not a disguise.

The problem only arises when caution becomes the default, when it stretches from August to March, when a whole season passes and the report still stops at "noted". At that point, we are no longer analysing. We are just producing paper.

I might also be wrong to undervalue long reports. Sometimes a dry document contains exactly one detail that helps. But if I had to choose between a hundred safe pages and one page that dares to speak, I choose the page that dares.

What to watch

Football stands at a crossroads. As automated analytics platforms powered by artificial intelligence become more common, the risk of an explosion of empty reports grows, because machines can produce thousands of pages without understanding anything. What separates a real analyst from a machine is not the volume of data, but the willingness to bet on a judgement.

The match is decided where the crowd is not looking. And in that meeting room, where there is no crowd, what decides is not how many pages the report runs, but whether anyone in it dares to say: "I believe this team will win, and here is why." Football does not need more documents. Football needs more people willing to conclude.