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 D'Urso →•View All Referees for Portsmouth →

🧑‍⚖️ Referee Analysis⚠️ BIAS DETECTED

A D'UrsovsPortsmouth

Analysis based on 12 matches since 2000

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

Wins

Draws

Losses

When A D'Urso officiates Portsmouth matches, the statistics reveal a severe negative pattern. Based on 12 matches spanning multiple seasons, our comprehensive analysis shows Portsmouth achieves a 25% win rate under A D'Urso, compared to the 45% baseline expected for teams at this level. This negative 20.0 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.

🚨STRONG BIAS DETECTED

🚨 STRONG BIAS DETECTED

This referee has a significantly negative history with this team. Win rate is severely below average.

Bias Score

-20.0%

Matches Analyzed

⚠️

Notable Negative Pattern

With a bias score of -20.0%, this ranks among the more significant negative patterns in our database. Over 12 matches, Portsmouth has won 20 percentage points fewer games than expected. For bettors and fantasy managers, this historical trend suggests extra caution when A D'Urso is appointed.

The Bias Meter™

Bias Level-20.0%

Bias AgainstNeutralFavorable

Match History

12 matches under this referee

Date	Opponent	Score	Result	Cards	Division
6 Apr 2015	Plymouth(H)	2 - 1	WIN	—	League Two
31 Jan 2015	Wycombe(A)	0 - 0	DRAW	🟨 4	League Two
5 Apr 2014	Hartlepool(H)	1 - 0	WIN	—	League Two
17 Mar 2012	Bristol City(H)	0 - 0	DRAW	🟨 2	Championship
16 Aug 2011	Reading(H)	1 - 0	WIN	🟨 2	Championship
2 May 2011	Norwich(H)	0 - 1	LOSS	🟨 2	Championship
1 Jan 2011	Watford(A)	0 - 3	LOSS	🟨 2🟥 1	Championship
7 Aug 2010	Coventry(A)	0 - 2	LOSS	🟨 1	Championship
15 Jan 2005	Blackburn(H)	0 - 1	LOSS	🟨 2🟥 2	Premier League
10 Apr 2004	Charlton(A)	1 - 1	DRAW	🟨 1	Premier League
29 Feb 2004	Newcastle(H)	1 - 1	DRAW	🟨 2	Premier League
30 Aug 2003	Wolves(A)	0 - 0	DRAW	🟨 5	Premier League

Frequently Asked Questions

Detailed Statistics

Win Rate (Under Ref)25.0%

Baseline Win Rate45%

Bias Score-20.0%

Cards for Portsmouth

🟨 Yellows / Game1.92

🟥 Reds / Game0.25

Cards for Opponents

🟨 Opp Yellows / Game1.50

🟥 Opp Reds / Game0.08

💰

Betting Outlook

TIPSTER INSIGHT

🟥

RED CARD RISK

Red card frequency: 0.25 per game

Higher than average dismissal rate in this matchup.

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

Share This Analysis

Think your mates need to see this? Share the evidence.