Arouca vs Estrela
Our model puts an Arouca win at 64.2% in this Primeira Liga fixture — the clearest call on this fixture. Expected goals run 2.1 to 0.91.
What this probability has been worth
A number is worth what it has been worth. Across 1,776 predictions published before kick-off and scored against the result afterwards, the calls we priced between 55% and 65% came in 50.2% of the time — 313 fixtures in that band. That is 9.3 points below what the model claimed, so read this figure as optimistic: in this range it has been saying more than it could support. We publish the gap rather than quietly shading the number, because a record that only shows its good bands is not a record.
Where we disagree with the market
Bookmakers price Arouca at 2.05, which implies about 48.8%. Our model has it at 64.2% — 15.4 points higher. That is a wide gap, and it is worth being plain about what it means: it is not a claim that the price is wrong and we are right. It means two methods that usually agree have landed far apart on this one, and only the result will say which of them read it better.
Attack against defence
The single rating hides where the mismatch actually sits. Splitting it, Arouca's attack should find room against Estrela's defence, by 97 points. That is the mechanism behind the expected-goals line rather than a separate opinion about it.