Warm Up
Discuss these questions with your partner before you start the lesson.
Question 1
Have you ever seen a team lose a match even though they played well? How do you explain that?
Question 2
What do you think is more useful — counting goals or counting good chances?
Question 3
Have you heard the term xG used in football? What do you think it means?
Vocabulary
8 key words for this lesson
xG (EXPECTED GOALS)
A number that shows how many goals a team should have scored based on the quality of their chances. An xG of 1.0 means they had chances good enough to score one goal.
"They had an xG of 2.3 but only scored once — they were very unlucky."
SHOT MAP
A visual that shows where every shot was taken on the pitch. It helps you see if a team is shooting from good or bad positions.
"The shot map showed all their attempts came from outside the box — that explains why they scored so few."
OVERPERFORM
To do better than the numbers suggest you should. If your xG is 0.8 but you score 2 goals, you have overperformed.
"The striker overperformed his xG all season — he scored 18 goals from chances worth only 12."
UNDERPERFORM
To do worse than the numbers suggest you should. If your xG is 2.0 but you only score once, you have underperformed.
"They underperformed their xG badly in the first half — three big chances and nothing to show for it."
METRIC
A specific way of measuring something. In football analytics, metrics are the numbers used to describe performance — like xG, pass completion, or sprints per game.
"xG is the most popular metric in modern football analysis."
PROBABILITY
How likely something is to happen. xG is based on probability — a chance with xG 0.9 has a 90% chance of being a goal.
"The xG model calculates the probability of a goal based on where and how the shot was created."
CHANCE QUALITY
How good a scoring opportunity is. A one-v-one from six yards is high quality. A shot from 35 yards is low quality.
"It's not just about how many chances they created — it's about the quality of those chances."
BIG CHANCE
A shot where the player should normally score — usually xG 0.4 or higher. Missing a big chance is considered a serious mistake.
"He missed two big chances in the second half — analysts gave both an xG of over 0.5."
Grammar Focus
Understand the grammar rule behind this lesson's topic
Grammar focus
Noun Phrases with Prepositions — describing data
When talking about statistics, you use noun phrases with prepositions to describe what numbers mean. Key patterns: "an xG OF 1.8" (value), "a shot FROM outside the box" (position), "a chance IN a one-v-one" (situation), "a save AGAINST the post" (difficulty). These phrases help you sound precise and analytical rather than just descriptive.
Phrases
6 phrases and their meanings
RACK UP
To collect or accumulate a lot of something over time — like shots, chances, or xG.
"They racked up an xG of 3.1 but only scored twice — their finishing let them down."
COME IN AT
To be at a specific level or value — used when stating a number or statistic.
"His xG for the season comes in at 14.2 — the highest in the league."
FACTOR IN
To include something when making a calculation or decision.
"The model factors in the position of defenders when calculating xG."
BACK UP
To support something with evidence or data — to prove something is true using numbers.
"His performance looked poor and the data backs that up — he created nothing all game."
MEASURE UP
To compare well against a standard — to be good enough when you look at the numbers.
"His xG numbers don't measure up to what you'd expect from a striker at that price."
BEAR OUT
To confirm or prove that something is true — when data shows that what you believed was correct.
"The stats bear out what we all felt — they dominated but their finishing was poor."
On the Pitch
Real phrases used on the pitch and at training — learn them, shout them!
These are the key situations on the pitch that xG is designed to measure — learn the language for each.
“The one-v-one — the highest xG situation”
A player alone against the goalkeeper is the highest-value chance in football. xG for a clear one-v-one is usually 0.7 to 0.9.
"He's one-v-one — that's got to go in!" On the pitch: "Take your time! Goalkeeper! Decide!" The analyst later: "He had a chance with xG of 0.74 — statistically he should score that more than seven times out of ten."
“The header from a cross — medium xG”
A headed chance from a cross usually has an xG of 0.1 to 0.3. It looks dangerous but headers are statistically harder to score than shots.
"He's met it perfectly — just over the bar!" The analyst: "The cross found him unmarked — xG of 0.18. Good chance, but not as easy as it looked."
“The long-range effort — low xG”
A shot from outside the penalty area has very low xG — usually 0.02 to 0.06. Most analysts say teams should avoid them.
"Long shot — goes wide. Not a surprise." On the pitch: "Don't shoot from there! Find a better position!" The analyst: "Eight shots from outside the box — total xG of 0.3. Those are wasted possessions."
“The penalty — fixed xG of 0.76”
A penalty always has an xG of 0.76 — the historical scoring average. Every penalty in every model is worth exactly 0.76 of a goal.
"It's a penalty — 0.76 xG. He must score this." On the pitch before stepping up: "Confident. Composed. You score these. Pick your spot." The analyst: "Converted as expected."
“The rebound chance — very high xG”
A chance from a rebound — when a shot is saved and the ball falls to another player — has very high xG because the goalkeeper is already off balance.
"Saved — and the follow-up! Into the net!" Rebound chances can have xG of 0.8 or higher. The analyst: "He was first to the rebound — xG of 0.81. Those are the chances you put away at this level."
“Cumulative xG — reading the whole match”
At the end of a match you add up all the xG to see who 'deserved' to win. This is called cumulative xG — the total built up over 90 minutes.
"Final score: 0-0. City had xG of 2.8, United 0.4 — City were very unlucky." Analysts read cumulative xG as a verdict: "The xG story of this match is very different from the scoreline."
Videos
Watch these terms used in context
Dialogue
Read the dialogue and hover the blue words for definitions
Right — let's look at Saturday's numbers. We lost 1-0 but our xG was 2.1. Their xG was 0.4.
So the data says we should have won.
Exactly. We created good chances — four shots from inside the box. But we missed two big chances with xG above 0.5 each.
And their goal?
A long-range effort. xG of 0.03. They had no right to score that.
So we dominated, they got lucky, and the scoreboard didn't reflect the game at all.
That's it. Over a season, these things even out. If we keep creating 2.0+ xG per game, the results will come.
Good. Show the players this — I want them to see they're doing the right things. The finishing will improve.
Exercises
Complete all three exercises to see your final score
Complete the Sentence
Choose the correct answer to complete each sentence.
Choose the best word or phrase to complete each sentence about xG and football data.
1.The model ___ the position of defenders when calculating chance quality.
2.His xG for the whole season ___ at 18.4 — the best in the division.
3.The stats ___ what the coach believed — good chances, but poor finishing.
4.A penalty always has an xG ___ 0.76 in standard models.
5.He ___ his xG last season — 20 goals from chances worth only 11.
6.They ___ up 3.1 xG across the match but the scoreline stayed at 0-0.
Matching
Click a word, then click its correct definition.
Click a word on the left, then its definition on the right.
Words
Definitions
Fill in the Blank
Drag the correct words from the word bank to complete each sentence.
Sentence 1
City created an xG— — —2.8 but only scored once.
Sentence 2
He— — —his xG — he scored 20 but his chances were worth only 14 goals.
Sentence 3
A penalty always has an xG— — —0.76 in every model.
Sentence 4
The data— — —what we saw — they dominated but were unlucky.
Sentence 5
His season xG— — —15.6 — the highest in the division.
Sentence 6
Long-range shots have very low— — —— analysts say teams should avoid them.
Sentence 7
The model— — —where defenders are when calculating the xG value.
Tip: Think about the meaning of each word and what makes sense in the sentence.
Multiple Choice
Choose the best answer for each question about the dialogue.
1.A team has an xG of 3.0 but scores 1 goal. What does this mean?
2.Which chance has the highest xG?
3.What does "cumulative xG" mean?
4.Fill in the gap: "They ___ up an xG of 2.4 without scoring — very unlucky."
5.A player scores 3 goals from chances worth 0.9 xG total. What happened?
Group Activities
Role-play scenarios and discussion questions for group classes
🎯 Choose the Best Response
A journalist or colleague makes a comment about xG. Choose the most accurate and professional response.
Customer says
“"xG is just a number — it doesn't tell you anything real about football."”
Salesperson responds…
Customer says
“"They had an xG of 0.2 and won 2-0. Does that mean they played badly?"”
Salesperson responds…
🔍 Spot the Mistake
Find the error in this analyst's presentation script.
Analyst
Good morning. Let me take you through last night's match data.
Analyst
City created an xG from 2.4 — that's a very high number for a single game.
Analyst
Their striker overperformed his xG — he scored twice from chances worth 1.1 total.
Analyst
United had a big chance in the 70th minute — xG of 0.62.
Analyst
Overall, the data backs up what we saw — City were the better team by a significant margin.
✏️ Finish the Salesperson's Line
Complete the analyst's sentence in a natural, professional way.
Customer
“”
Salesperson
“Their xG was 2.8 but they only scored once, which means... …”
Customer
“”
Salesperson
“When we factor in the quality of the chances, not just the number of shots... …”
Customer
“”
Salesperson
“A penalty always has an xG of 0.76, which means... …”