Excelsior vs FC Groningen
Our model puts an Excelsior win at 50.3% in this Eredivisie fixture — a moderate lean. Expected goals run 1.72 to 1.15.
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 45% and 55% came in 46.5% of the time — 550 fixtures in that band. The model claimed 49.5%, so the two are within 2.9 points of each other. In this range the stated probability has meant roughly what it says.
Where we disagree with the market
Bookmakers price FC Groningen at 2.5, which implies about 40%. Our model has it at 25.7% — 14.3 points lower. 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.
Evenly rated
There is almost nothing between these two on rating — 1496 against 1518, a gap of 22 points. Fixtures this evenly matched are where a model has least to say: the probabilities below are honest, but they are close to a coin weighted only slightly.
Attack against defence
The single rating hides where the mismatch actually sits. Splitting it, FC Groningen's attack should find room against Excelsior's defence, by 105 points. That is the mechanism behind the expected-goals line rather than a separate opinion about it.