Primera Nacional · Sunday, 23 August 2026 · 19:30. Our rating makes this 24% to go over 2.5 goals, so our lean is under. The Primera Nacional average is 29%.
Open this match in the app →| Market | Yes | No | Our call |
|---|---|---|---|
| Over 2.5 goals | 24% | 76% | Under |
| Over 3.5 goals | 9% | 91% | no pick |
| Both teams to score | 37% | 63% | No |
The result model puts Chacarita Juniors at 43%, the draw at 33% and San Martin Tucuman at 24%, from expected goals of 1.02 and 0.69.
The league sets the starting point. Primera Nacional has produced over 2.5 goals in 29% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Chacarita Juniors have 5 in 24 this season (3 of 11 at home), San Martin Tucuman 6 in 25 (1 of 12 away). Those records are pulled toward the league rate with the weight of about 32 matches — enough that two or three unusual games cannot swing a rating — giving 26% and 24%.
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 26%.
Head to head. These sides have met 3 times in three years, producing over 2.5 goals in 0%. That nudges the number 10% of the way toward the head-to-head pattern — deliberately small, because fixtures change more than reputations do — landing on 23%.
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 25%, from expected goals of 1.02 for Chacarita Juniors and 0.69 for San Martin Tucuman. Folding in 30% of that view gives 24%.
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.
| Team | Games | O2.5 | O3.5 | BTTS |
|---|---|---|---|---|
| Chacarita Juniors | 24 | 21% | 8% | 29% |
| San Martin Tucuman | 25 | 24% | 8% | 40% |
More: Chacarita Juniors season stats · San Martin Tucuman season stats · Primera Nacional table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.