Primeira Liga · Sunday, 20 September 2026. Final score 3–1 (half-time 1–0). Before kick-off we rated it 52% over 2.5 goals — the match finished with 4, so that call landed. That rating was frozen into a version-controlled ledger before the game and has not been touched since.
Open this match in the app →| Market | Yes | No | Our call |
|---|---|---|---|
| Over 2.5 goals | 51% | 49% | Over |
| Over 3.5 goals | 28% | 72% | no pick |
| Both teams to score | 47% | 53% | No |
The result model puts FC Porto at 29%, the draw at 31% and Benfica at 40%, from expected goals of 0.91 and 1.12.
The league sets the starting point. Primeira Liga has produced over 2.5 goals in 54% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. FC Porto have 3 in 6 this season (1 of 3 at home), Benfica 6 in 6 (3 of 3 away). Those records are pulled toward the league rate with the weight of about 24 matches — enough that two or three unusual games cannot swing a rating — giving 53% and 63%.
Last season still counts, briefly. With 6 and 6 games played this season, last season's rates are still blended in and fade out entirely by game 40 — the point at which our testing showed they stop adding accuracy. A single season is part luck, so each club's record is first pulled toward the league average by 34 games' weight. That moves the two figures to 54% and 62%.
The mix. Weighted 40% home side, 40% away side and 20% league — the split that beat every alternative across 30,582 matches of testing — that gives 57%.
Head to head. These sides have met 6 times in three years, producing over 2.5 goals in 67%. That nudges the number 5% of the way toward the head-to-head pattern — deliberately small, because fixtures change more than reputations do — landing on 58%.
Goal expectation. Separately a Poisson model built from attack and defence strength — using real expected-goals data where the league has it — puts this match at 33%, from expected goals of 0.91 for FC Porto and 1.12 for Benfica. Folding in 30% of that view gives 51%.
This breakdown is generated from the same inputs the rating uses, so it cannot describe a calculation we did not perform. The full model is set out in the methodology.
More: FC Porto season stats · Benfica season stats · Primeira Liga table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.