A metric that scores every shot by its probability of resulting in a goal, based on factors like shot location, angle, and assist type.
Expected Goals (xG) is a statistical measure that assigns every shot a value between 0 and 1 representing the probability of that shot becoming a goal. A penalty kick is typically valued around 0.76 xG — it results in a goal about 76% of the time. A header from 25 yards might be 0.03 xG.
xG is calculated by analysing thousands of similar historical shots and measuring how often each type resulted in a goal. The key inputs are shot location, shot angle to goal, whether it was a header or with the foot, the assist type (cross, through ball, set piece), and whether the goalkeeper was in position.
Raw goals are noisy. A team can win 3-0 thanks to two long-range deflections and a penalty against the run of play, while another team dominates possession and shots but loses 1-0. xG strips out that noise by measuring the quality of chances created, not just the outcomes.
Over a season, xG is a far better predictor of future performance than actual goals. Teams that consistently outperform their xG (score more than expected) typically regress toward their xG figure — they were getting lucky, not performing better.
Most modern football prediction models use xG rather than raw goals as the primary input. An xG-based Poisson model calculates each team's true attacking and defensive quality, producing scoreline probabilities that are more stable and predictive than goal-based models.
xG is also displayed directly on fixture pages and match analysis — giving you an immediate read on which team truly dominated, regardless of the final score.
xGA (Expected Goals Against)
The expected goals conceded by a team — a measure of defensive quality based on the quality of chances allowed, not just goals shipped.
PPDA (Passes Per Defensive Action)
A measure of pressing intensity — how many opposition passes are allowed before a defensive action is made in the opponent's half.
Poisson Distribution
The statistical model used to predict football match scorelines by treating goal-scoring as a random process based on each team's expected goals rate.
npxG (Non-Penalty Expected Goals)
Expected goals with penalties removed — a purer measure of a team or player's open-play goalscoring threat.
xPTS (Expected Points)
The number of league points a team would be expected to earn based on their xG and xGA across a series of matches.
Post-Shot xG (xGOT): What It Is and Why It Matters
Post-shot expected goals (xGOT) measures the quality of a shot after it leaves the boot. We explain xGOT vs xG, how it is calculated, and how to use it.
Football Shot Maps Explained: How to Read Them Like an Analyst
Football shot maps visualise every shot in a match or season — distance, angle, xG, body part, outcome. We break down how to read them and what they reveal.
Football KPIs: The Key Performance Indicators That Actually Matter
Football KPIs (Key Performance Indicators) are the small set of metrics that consistently predict match outcomes. We list the 12 that matter, what each measures, and which are noise.
Diving in Football: Meaning, Rules, and Why It Persists
Diving in football — also called simulation — is the act of feigning a foul to win a free kick, penalty, or get an opponent booked. We explain the rules, the punishments, and why it persists.
The Football Coin Toss: What It Decides and Why It Still Matters
The football coin toss decides which team kicks off and which end each team attacks first. We explain the IFAB rules, what the captain choice actually decides, and why it persists.
Aerial Threat in Football: What It Means and Why It Decides Set Pieces
Aerial threat in football is a player's effectiveness in winning headers and scoring from crosses. We explain the metric, the technique, and the players who define elite aerial threat.
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