What is the Bias Score and how is it calculated?

The Bias Score compares a team's win rate under a specific referee to their baseline win rate (45%). A negative score suggests the team performs worse than average under that referee.

What sample size is considered reliable?

We recommend at least 5 games for initial patterns and 10+ games for high confidence.

← Back to Home•View All Teams for A Haines →•View All Referees for Portsmouth →

🧑‍⚖️ Referee Analysis⚠️ BIAS DETECTED

A HainesvsPortsmouth

Analysis based on 10 matches since 2000

* Note: Detailed card statistics for matches before 2005 may be incomplete.

Wins

Draws

Losses

When A Haines officiates Portsmouth matches, the statistics reveal a notable negative pattern. Based on 10 matches spanning multiple seasons, our comprehensive analysis shows Portsmouth achieves a 30% win rate under A Haines, compared to the 45% baseline expected for teams at this level. This negative 15.0 percentage point difference suggests a meaningful pattern worth examining. The data includes detailed card statistics, match outcomes, and historical trends to provide football fans, bettors, and analysts with evidence-based insights into this referee-team dynamic.

⚠️POTENTIAL BIAS

⚠️ POTENTIAL BIAS DETECTED

This team performs notably worse under this referee compared to their overall average.

Bias Score

-15.0%

Matches Analyzed

⚠️

Notable Negative Pattern

With a bias score of -15.0%, this ranks among the more significant negative patterns in our database. Over 10 matches, Portsmouth has won 15 percentage points fewer games than expected. For bettors and fantasy managers, this historical trend suggests extra caution when A Haines is appointed.

The Bias Meter™

Bias Level-15.0%

Bias AgainstNeutralFavorable

Match History

10 matches under this referee

Date	Opponent	Score	Result	Cards	Division
6 Mar 2021	Northampton(A)	1 - 4	LOSS	🟨 1	League One
5 Oct 2019	Doncaster(A)	2 - 1	WIN	🟨 2	League One
25 Aug 2018	Doncaster(A)	0 - 0	DRAW	🟨 3	League One
28 Apr 2018	Bury(A)	0 - 1	LOSS	🟨 2	League One
7 Apr 2018	Rochdale(A)	3 - 3	DRAW	—	League One
10 Dec 2016	Grimsby(A)	1 - 0	WIN	🟨 2	League Two
31 Oct 2015	Notts County(A)	1 - 2	LOSS	🟨 1	League Two
25 Jan 2014	Morecambe(A)	2 - 2	DRAW	—	League Two
17 Sept 2011	Hull(A)	0 - 1	LOSS	🟨 1🟥 1	Championship
12 Feb 2011	Doncaster(A)	2 - 0	WIN	🟨 2🟥 1	Championship

Frequently Asked Questions

Detailed Statistics

Win Rate (Under Ref)30.0%

Baseline Win Rate45%

Bias Score-15.0%

Cards for Portsmouth

🟨 Yellows / Game1.40

🟥 Reds / Game0.20

Cards for Opponents

🟨 Opp Yellows / Game1.00

🟥 Opp Reds / Game0.10

💰

Betting Outlook

TIPSTER INSIGHT

🟥

RED CARD RISK

Red card frequency: 0.2 per game

Higher than average dismissal rate in this matchup.

⚠️ This is statistical analysis, not betting advice. Gamble responsibly.

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