C.D. Nacional vs Braga
Our model puts a Braga win at 65.7% in this Primeira Liga fixture — the clearest call on this fixture. Expected goals run 0.88 to 2.15.
What this probability has been worth
A number is worth what it has been worth. Across 2,054 predictions published before kick-off and scored against the result afterwards, the calls we priced between 65% and 75% came in 69.9% of the time — 193 fixtures in that band. The model claimed 69.4%, so the two are within 0.6 points of each other. In this range the stated probability has meant roughly what it says.
The ratings gap
Braga carry a rating of 1684 against 1470 for C.D. Nacional, a gap of 214 points. On our scale that is the difference between a side that controls most of its fixtures and one that has to earn each of them. It is also the single largest input into the probabilities above.
Attack against defence
The single rating hides where the mismatch actually sits. Splitting it, Braga's attack should find room against C.D. Nacional's defence, by 178 points. That is the mechanism behind the expected-goals line rather than a separate opinion about it.