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Shock result as Portsmouth defy the odds to beat Middlesbrough 0-1.

📝 Match Report

How It Unfolded

Portsmouth beat Middlesbrough 0-1 at Riverside Stadium, Regular Season - 42, in the Championship. The remainder of the report sets that outcome against the pre-match model, the markets and the teams' data profiles.

The Model vs The Result

The Poisson model went into this projecting Middlesbrough 1.73 xG and Portsmouth 0.91 xG, a combined 2.64. The scoreboard read 0-1 for 1 actual goal. Middlesbrough fell 1.7 short of their projected output. Those figures were built on strength ratings of Middlesbrough attack 0.99 / defence 0.84 against Portsmouth attack 0.91 / defence 1.36, drawn from 87/86 games (CurrentSeason).

On the result, the model split it Middlesbrough 55% | Draw 27% | Portsmouth 18%, with Middlesbrough to win its most likely call at 55%. Instead the game produced a Portsmouth win, an outcome the model had rated at just 18% — a clear break from expectation and a genuine upset by the numbers.

Goals & Markets

The model rated Over 2.5 goals at 49%. The game delivered 1, so it stayed under — in line with the projection. Over 1.5 had been 76% and missed. On both teams to score, the model sat at 51% and the match did not — a miss on BTTS. Historically the two sides average 52% Over 2.5 across their same-competition games (Middlesbrough 50%, Portsmouth 54%), a base rate that pointed the other way from today's under. Their combined BTTS history runs at 55%, which did not match the one-sided outcome.

Trading Patterns vs Reality

Middlesbrough's trading profile (86 games, 42 home) set some clear expectations: BTTS lands in 54% of their matches — today it did not; they fail to score in 27% of games, a blank that repeated today.

Portsmouth's trading profile (86 games, 42 away) set some clear expectations: BTTS lands in 56% of their matches — today it did not.

Form vs Result

On form, Middlesbrough arrived the stronger side — 1.55 PPG against 1.12. Form was overturned, with Portsmouth winning despite arriving in poorer recent shape. Middlesbrough (home/away splits) managed 0 against a 1.38 scoring average — below par going forward. Portsmouth (home/away splits) conceded 0 against a 1.95 average — tighter than their form line.

Verdict

Grading the result against the stored data, 1 of 4 pre-match signals came in: result (miss), Over 2.5 (hit), BTTS (miss), form (miss). This one broke away from the data — most of the pre-match signals were overturned by how the ninety minutes actually played out.

💡 Key Insights