Football formations are written using a series of numbers that describe how outfield players are positioned on the pitch. These numbers are always read from the defensive line towards the attacking line. The goalkeeper is not included because every team starts with one goalkeeper.
For example, a 4-3-3 formation means:
Adding the goalkeeper gives a total of 11 players on the field.
Other common examples include:
These numbers provide a simple way to describe how a team is initially arranged before the match begins.
A formation should not be viewed as a rigid system that players follow throughout the entire match. Instead, it represents the team's default starting structure, particularly when defending.
Once play begins, players constantly move to create passing options, cover teammates, press opponents, and exploit space. As a result, the team's shape changes throughout the game.
For example, a team listed as playing 4-3-3 may see its full-backs push high up the pitch during attacks while one midfielder drops deeper to help build possession. Although the team sheet still says 4-3-3, the actual positions of the players may look very different.
Two teams can use exactly the same formation while playing completely different styles of football.
Consider two teams both listed in a 4-3-3:
The formation remains identical, but the tactical approach is completely different.
This is because a formation only describes the initial arrangement of players. The team's playing style depends on many additional factors, including:
For this reason, analysts rarely judge a team's style by formation alone.
Modern football analysis places greater emphasis on team shape than on the formation shown before kickoff.
Shape refers to how players are actually positioned during different phases of play rather than where they started.
This describes how a team organizes itself defensively when the opposition has the ball.
For example, a team may defend in a compact 4-4-2 with two clear defensive lines that make it difficult for opponents to find space.
This describes how the same team organizes itself while attacking.
As players move forward, the structure may become a 3-2-5, where:
Although the official formation has not changed, the attacking shape looks entirely different because players have moved into new roles.
Understanding team shape provides a much clearer picture of how a team actually plays. Analysts study how players move during different phases of possession, how defensive lines shift, and how attacking structures are created.
This approach explains why two teams with identical formations may generate very different numbers for possession, Expected Goals (xG), pressing intensity, and chance creation.
Rather than focusing only on the formation listed before kickoff, modern analysis examines how the team's shape evolves throughout the match.
Formation numbers such as 4-3-3 or 4-4-2 describe only the team's starting defensive structure and exclude the goalkeeper. They provide a useful reference point but do not fully explain how a team plays. Modern football analysis focuses on team shape during both possession and defensive phases because player movement, tactical instructions, and individual roles have a much greater influence on performance than the formation shown on the team sheet.
