Predictions / Football / Portugal. Segunda Liga / Benfica B vs Portimonense

Prediction Audit: Benfica B vs Portimonense Prediction, Odds & AI Betting Tips

Aug 21, 2026 - 17:00
1 1.33
1 1.27
xG Accuracy: 85%

The model missed the final outcome (Draw 1–1).

The model had projected Benfica B at 36.6%, but the full-time result went the other way.

Tracked markets vs full-time result

Prediction grade C

Each row compares the pre-match model lean to the full-time result.

  • Market Prediction Result Outcome
  • Over / Under 2.5 Under 2.5 Under 2.5 (2 goals) ✔ Correct
  • Both Teams To Score BTTS Yes Yes ✔ Correct
  • 1X2 Benfica B Draw ✖ Incorrect
  • Correct Score Insights 1-1, 1-0, 0-1, 2-1, 1-2 1-1 ✔ Correct

Model vs Closing Market

Strong Disagreement

The closing market prices Benfica B higher than the statistical model.

Largest probability gap: Benfica B -12.0 pp

Outcome Model Closing Market Difference Signal
Benfica B 36.6% 48.6% -12.0 pp Market Higher
Draw 29.6% 27.2% +2.4 pp Aligned
Portimonense 33.8% 24.2% +9.6 pp Model Higher

The closing market estimates Benfica B's win probability at 48.6%, compared with the model's estimate of 36.6%, a difference of 12.0 percentage points. This highlights a disagreement between the model and market consensus, without indicating which view is ultimately correct.

Model probabilities are generated from the statistical xG model using a Poisson distribution. Closing market probabilities are derived from consensus closing 1X2 odds after margin removal. Values represent implied probabilities rather than betting recommendations. Closing snapshot: PRE1.

After full time, the result was Draw 1–1.

Market Assessment

The market is materially more optimistic about Benfica B than the current fair estimate.

  • Investors may be incorporating information not fully reflected in the baseline model.
  • Tournament-specific context can shift market pricing.

Post Match Insights

What worked

  • Both Teams To Score (Yes) matched the full-time result
  • Under 2.5 goals aligned with the xG profile
  • Exact score 1–1 fell within the model's highlighted bins

What failed

  • 1X2: model leaned Benfica B; match finished Draw

Market lesson

The closing market differed from the model on Benfica B by 12.0 percentage points (48.6% vs model 36.6%) — in this case the market view proved closer.

Premium betting site stake: New users can use the promo code FHn2uDc1 to receive $100 cash.

Prediction Timeline

How this prediction moved from forecast to full-time review.

  1. Aug 21, 2026 · 17:02 UTC Forecast generated
    • Model 1X2 · Benfica B 36.6% · Draw 29.6% · Portimonense 33.8%
    • xG · Benfica B 1.33 — Portimonense 1.27
  2. Aug 21, 2026 · 16:35 UTC Opening odds snapshot PRE30
    • 1X2 odds · Benfica B 1.96 · Draw 3.50 · Portimonense 3.94
    • Implied 1X2 · Benfica B 48.6% · Draw 27.2% · Portimonense 24.2%
    • Bookmaker · Pinnacle
  3. Aug 21, 2026 · 17:02 UTC Closing snapshot recorded PRE1
    • 1X2 odds · Benfica B 1.96 · Draw 3.50 · Portimonense 3.94
    • Implied 1X2 · Benfica B 48.6% · Draw 27.2% · Portimonense 24.2%
    • Bookmaker · Pinnacle
  4. Aug 21, 2026 · 17:00 UTC Kickoff
  5. FT Full-time result Draw · 1–1
  6. FT Prediction missed 1X2 lean did not match full-time result
  7. Archived Prediction review

Historical Snapshot

Frozen at kickoff — the model output as it stood before the match started.

Historical verdict: Monitor
Historical Decision Monitor
Outcome Missed
Pre-match metrics (historical context)
Prediction Reliability 57/100 · Moderate
  • Validation: Warning
  • Large market gap (12 pp)
Evidence ★★★★★
  • No strong statistical edge
  • Market has already priced much of the edge
  • Validation warning
Pricing proximity (inverse gap) 39/100
Betting Confidence 45/100

Validation Report

Immutable Snapshot

Prediction Time: Aug 15, 2026 · 01:41 UTC Snapshot ID: dp-4029135

Closing Odds 1.96
AI Fair Odds —
CLV Pending
Final Result Draw · Benfica B 1–1 Portimonense
Prediction ✖ Missed
Decision Grade C

Model Performance

This prediction contributes to:

  • Primary Bets ROI (180d): -100.0%

Review FAQ

How accurate was the prediction?
This page grades directional markets (1X2, Over/Under 2.5, BTTS) against the full-time result. The prediction grade reflects how many of those tracked markets matched reality.
What does xG Accuracy measure?
xG Accuracy compares the model's pre-match expected-goals profile to the actual scoreline — not whether every market hit. A strong directional review can coexist with a moderate xG accuracy score.
Why wasn't the exact score predicted?
Correct-score outcomes are low-probability tails even when the model reads the match profile well. We highlight top score bins for context; missing the exact line does not invalidate a directional review.
Does this improve the AI record?
Each finished match is logged in our validation pipeline. Aggregated hit rates and CLV studies are published separately — this page is the per-match audit trail.

Predictions are for informational purposes only. Always gamble responsibly and within your limits. Past performance does not guarantee future results.

AI match briefing

AI Match Summary

Pre-match snapshot for this fixture.

  • League: Segunda Liga
  • Fixture: Benfica B vs Portimonense
  • Kickoff: 2026-08-21 17:00:00
  • 1X2 (model): Home 36.6% · Draw 29.6% · Away 33.8%
  • xG (showing): Benfica B 1.33 — Portimonense 1.27 (total xG ≈ 2.6)
  • Value headline: At least one tracked line reaches the headline EV threshold — align with the hero / Primary card if shown.
  • Structural leans (not bets): Structural lean (model): O/U 2.5 Under 2.5 (Under 2.5 51.8% · Over 2.5 48.2%); BTTS Yes (Yes 54.5% · No 45.5%) Value lean (pricing): O/U 2.5 Under 2.5; BTTS Yes
  • BTTS (model): Yes 54.5% · No 45.5%
  • Correct score (top bin): 1-1 (12.5%)

The decision block shows no default Primary: Primary needs consensus EV ≥ +5.0% plus strength/reliability/calibration gates. A separate Lean/tracked gate is +2.0% (selective only). Lean labels are directional only — not bankroll-sized recommendations.

Most likely correct score stays a low-probability tail: use it for context, not as a must-bet story.

Historical Recommendation

Historical Decision: Monitor

Outcome: Missed — Pre-match 1X2 lean did not match the full-time result.

Risk Factors Considered Before Kickoff

  • Price movement: implied probabilities and EV move with odds.
  • Sample / data gaps: low-information leagues widen forecast bands.
  • In-play state: goals and red cards are not modelled here.
  • Scoreline variance: the most likely scoreline is still usually a low absolute probability outcome (often well below 20%).

Last Updated

September 29, 2026 (UTC)

Get Premium Predictions for Benfica B & Portimonense!

Unlock in-depth analysis, exclusive betting tips, and match forecasts with our premium subscription service.

Subscribe Now
Back to Predictions
Segunda Liga Segunda Liga — Standings
# TEAM MP W D L PTS
1 Lusitânia Lourosa 6 5 1 0 16
2 Penafiel 6 4 1 1 13
3 Sporting CP B 6 4 0 2 12
4 Vizela 6 3 2 1 11
5 Benfica B 6 3 1 2 10
6 União de Leiria 6 3 1 2 10
7 Leixoes 6 3 1 2 10
8 Academica 6 3 0 3 9
9 Tondela 6 3 0 3 9
10 Farense 5 2 2 1 8
11 Portimonense 6 2 1 3 7
12 AVS 6 1 3 2 6
13 Felgueiras 1932 6 1 3 2 6
14 Torreense 6 1 3 2 6
15 Amarante 6 1 2 3 5
16 Chaves 5 1 1 3 4
17 FC Porto B 6 1 1 4 4
18 Feirense 6 0 1 5 1
# TEAM MP GS GC +/- PTS
1 Penafiel 6 13 5 +8 13
2 Lusitânia Lourosa 6 11 4 +7 16
3 União de Leiria 6 10 7 +3 10
4 Sporting CP B 6 8 6 +2 12
5 Leixoes 6 8 6 +2 10
6 Academica 6 8 10 -2 9
7 Vizela 6 7 4 +3 11
8 Benfica B 6 7 5 +2 10
9 Farense 5 7 5 +2 8
10 Tondela 6 7 6 +1 9
11 Torreense 6 7 9 -2 6
12 AVS 6 6 6 0 6
13 Felgueiras 1932 6 5 6 -1 6
14 Amarante 6 5 8 -3 5
15 Chaves 5 5 9 -4 4
16 Portimonense 6 4 6 -2 7
17 FC Porto B 6 4 13 -9 4
18 Feirense 6 1 8 -7 1
Segunda Liga Portugal. Segunda Liga Predictions