What Is xG in Football? A Guide to xG, xGA, xGoT and Expected Points
What do xG, xGA, xGoT, npxG, xGD and xPTS mean in football? A complete guide to reading expected-goals data properly.
The team with more shots does not always play the better football. The team that concedes fewer goals does not always defend better, either.
Results matter, but scorelines do not explain everything that happened on the pitch. Expected goals, or xG, helps measure the quality of chances created during a match.
But xG on its own is not enough.
xG on Target, or xGoT, looks at the quality of a shot after it is placed on target. Non-penalty xG removes penalties from the picture. Open-play and set-play xG show where a team’s threat comes from. xGA measures the chances a team allows, while xGD and xPTS help put attacking and defensive performance into a broader context.
StatsLook lets you select and compare these metrics between two teams:
https://statslook.com/lab/team-comparison
What is xG?
xG stands for Expected Goals.
It assigns a probability to every shot based on how often similar shots have been scored in the past. Each attempt receives a value between 0 and 1:
0.10 xG: shots of this type are scored roughly 10% of the time.0.50 xG: they are scored roughly once every two attempts.0.80 xG: it is a very high-quality scoring opportunity.
A team’s total xG is the sum of the scoring probabilities from all of its shots.
If a team produces 1.80 xG, it does not mean that it should definitely score two goals. It means that, based on the quality of its chances, its attacking output was worth around 1.80 goals on average.
Football remains unpredictable. A side can score twice from 0.40 xG, or fail to score after producing 2.50 xG. xG is not a replacement for the scoreline. It is a way to understand the chance quality behind it.
What xG can and cannot tell you
xG measures the probability of a shot becoming a goal. Factors such as distance, angle and the nature of the chance influence its value.
That makes xG useful for questions such as:
Did a team create genuinely good chances?
Did it take a large number of low-quality shots?
Is its goal total above or below the quality of chances it created?
Was a win supported by a strong underlying performance?
But xG does not explain everything.
Possession, passing quality, defensive positioning, pressing, movement before the shot and a player’s overall contribution cannot be reduced to xG alone. Nor does xG prove exactly how many goals a team “deserved” to score.
The best approach is to read xG alongside goals, shots, big chances, key passes, xGA and the context of the match.
What is xGoT?
xGoT stands for Expected Goals on Target.
While xG evaluates the quality of a chance before the shot is taken, xGoT focuses on the quality of the shot after it has been placed on target.
In simple terms:
xG asks: “How good was the chance?”
xGoT asks: “How well was the shot placed?”
Two players can have similar-quality chances. One may hit the ball directly at the goalkeeper, while the other places it in the corner. Their original xG may be similar, but the better-placed shot can produce a higher xGoT value.
This makes xGoT useful when assessing finishing and the quality of shots a goalkeeper has faced.
High xG with low xGoT can indicate that a team found good positions but did not execute its shots well. High xGoT suggests that its on-target efforts were more difficult for the goalkeeper to save.
What is npxG?
npxG means Non-Penalty Expected Goals.
Penalties are high-probability, relatively standardised chances. Because they can significantly inflate a team’s xG, they can distort comparisons of open-play attacking output.
npxG removes that effect.
Two teams may both record 2.00 xG. But if 0.80 of one team’s total came from a penalty while the other created all of its xG from open play and set plays, their attacking performances were not the same.
Read total xG and npxG together to understand how much of a team’s threat is coming from normal play rather than penalties.
Open-play xG: xGOP
xGOP stands for Expected Goals Open Play.
It measures the expected-goals value of chances created during open play, excluding set plays, corners, free kicks and penalties.
A high xGOP total usually suggests that a team can break down opponents within the flow of the game, reach dangerous areas and create quality shooting situations without relying on dead-ball situations.
Use xGOP to explore questions such as:
How productive is a team in open play?
Does its attacking threat come from open play or set pieces?
Is possession turning into high-quality chances?
A team can have strong total xG but low xGOP if a major share of its attacking output comes from set plays. That is not inherently negative. It simply describes a different attacking profile.
Set-play xG: xGSP
xGSP means Expected Goals Set Play.
It measures the chance quality created from set-play situations, including corners, free kicks and other dead-ball routines.
Set plays are not a secondary part of modern football. They are a major attacking weapon, particularly in close matches where open-play chances are limited.
High xGSP can mean:
A team has effective set-play routines.
Opponents are struggling to defend its dead-ball situations.
Read xGSP alongside xGOP to see where a team’s goalscoring threat is coming from.
Corner xG: xGC
xGC stands for Expected Goals from Corners.
It is a narrower part of set-play xG and measures only the chance quality created after corners.
This metric helps answer questions such as:
Does a team create real danger from corners?
Which side is more vulnerable when defending corners?
How much of a team’s set-play threat comes specifically from corners?
A team can win a high number of corners while producing low corner xG. That would suggest volume without much chance quality. The important number is not how often a side takes corners, but how dangerous those corners become.
Free-kick xG: xGFK
xGFK stands for Expected Goals from Free Kicks.
It isolates scoring opportunities created from free-kick situations, whether through direct attempts or designed routines.
For most teams, free-kick xG will remain relatively low because high-quality free-kick opportunities are not frequent. But it can still matter in tight matches, particularly for teams with strong dead-ball delivery or direct free-kick specialists.
Sample size matters here. Over a short period, one dangerous free kick can significantly affect the metric.
Penalty xG
Penalty xG measures the expected-goals value of penalties won by a team.
Because penalties are high-probability chances, they can have a significant impact on total xG. Comparing total xG, npxG and penalty xG together shows how much a team is producing through open play and set plays, and how much comes from penalties.
A high penalty xG figure can also suggest that a team is regularly forcing opponents into difficult situations inside the box. But it should not be treated as equivalent to open-play chance creation.
What is xGA?
xGA stands for Expected Goals Against.
It measures the total scoring probability of the shots a team allows its opponents. It is one of the most important process metrics for assessing defensive performance.
Low xGA generally suggests that a side is allowing fewer or lower-quality chances. High xGA can reveal a growing defensive problem even if the number of goals conceded remains low.
For example, a team may concede only two goals across four matches but allow 6.00 xGA. That can point to excellent goalkeeping, poor opposition finishing or short-term variance masking the defensive risk.
The reverse can also happen. A team may have low xGA but concede more goals than expected because opponents finished a small number of chances extremely well, individual errors occurred, or goalkeeping was below par.
Read xGA alongside goals conceded, goalkeeper saves and saves inside the box for a fuller picture.
What are Expected Goals Prevented?
Expected Goals Prevented helps connect the quality of chances a team allows with the goals it actually concedes.
Its basic logic is the gap between the expected value of opposition chances and the actual outcome. A positive figure can indicate that fewer goals were conceded than the chance quality suggested; a negative figure can indicate that more goals were conceded than expected.
This metric should not be used alone to declare a defence good or a goalkeeper poor. Over short periods, finishing variance, individual mistakes and unusual match events can create large gaps. It is most useful when read with xGA, goals conceded and save data.
Note: StatsLook may display both Penalty xG and Expected Goals Prevented with the abbreviation xGP. These refer to different metrics, so the full metric name should always be visible to avoid confusion.
What is xGD?
xGD stands for Expected Goals Difference.
It is calculated by subtracting xGA from xG:
xGD = xG − xGA
A positive xGD means a team is creating more chance quality than it is allowing. A negative xGD means it is conceding more quality than it produces.
Because it considers attack and defence at the same time, xGD is especially useful for assessing a team’s overall level across a season.
A team can have a high points total but a negative xGD, which may indicate that its results have been better than its underlying performances. A side with a strong positive xGD but fewer points may be suffering from finishing, goalkeeping or short-term results variance.
What are Expected Points?
xPTS stands for Expected Points.
It estimates how many points a team would be expected to collect based on the xG performances in its matches. Rather than looking only at wins, draws and defeats, it considers the chance quality that led to those outcomes.
The gap between actual points and xPTS can be revealing:
A team above its xPTS may be getting better results than its underlying chance quality suggests.
A team below its xPTS may be performing better than its league position indicates.
This does not guarantee what will happen next. Football is not played by averages alone. But xPTS offers a valuable starting point when asking whether a team’s results look sustainable.
Five rules for reading xG data properly
Do not treat xG as a replacement for goals.
Goals are the outcome; xG is the quality of chances. Read both together.Do not make final judgments from one match.
A small number of shots can heavily influence xG. Look for trends across multiple matches.Separate the sources of xG.
Open play, set plays, corners, free kicks and penalties do not tell the same attacking story.Do not assess defending without xGA.
Conceding few goals does not automatically mean a team is defending well.Connect xG to the wider game context.
Shots, big chances, final-third passes, ball recoveries and goalkeeper data explain the story behind the xG number.
How to compare xG metrics on StatsLook
Open the Team Comparison tool and select two teams.
Open the xG metrics group.
Choose up to 10 relevant metrics.
Start with total xG and xGA.
Use xGoT, npxG, xGOP and set-play xG to identify the source of attacking production.
Use xGD and xPTS to assess overall balance and results over a longer period.
xG is not a number that replaces football. It is a shared language for understanding chance quality, defensive risk and how sustainable results may be.
Compare xG, xGA, xGoT, xGD and xPTS for any two teams with StatsLook:
