Full Back in Football: Role & Duties

What Is a Full Back?

A full back is one of the most physically demanding positions in modern football. Traditionally, the role was purely defensive: two players, one on each flank, sat alongside the centre-backs to form a back four. Their main job was to mark the opposition’s wide attackers, block crosses, and clear the ball. Today, the position has evolved into a hybrid role that blends defending with attacking support. Full backs are expected to contribute to build-up play, overlap wingers, deliver crosses, and even cut inside to create overloads in midfield. The shift has made the position one of the most tactically complex on the pitch.

Core Defensive Duties

The primary job of a full back is to stop the opposition from creating chances down the flanks. This involves several specific tasks:

Marking the winger: Stay goal-side of the opposing wide player, preventing them from receiving the ball in dangerous areas.
Blocking crosses: Close down the attacker quickly to force them to pass backwards or inside, rather than delivering a cross into the box.
Tackling and intercepting: Win the ball cleanly when the opponent tries to dribble past, and read passes to cut out through-balls.
Defending the back post: When the ball is on the opposite flank, the far-side full back must tuck in to cover the area behind the centre-backs.

Positioning is critical. A full back must stay goal-side of their man, meaning they position themselves between the attacker and their own goal. They also need to be aware of runners making diagonal runs behind them. Communication with the centre-back on their side is essential to avoid gaps in the defensive line.

Attacking Responsibilities

Modern full backs are often the team’s primary source of width. When the team has possession, the full back pushes high up the pitch to stretch the opposition’s defence. Key attacking duties include:

Overlapping runs: Sprinting past the winger on the outside to receive a pass and deliver a cross.
Underlapping runs: Making a run inside the winger into the half-space to create confusion or receive a pass in a central area.
Delivering crosses: Whipping in accurate balls from deep or byline positions for strikers to attack.
Supporting midfield: Tucking inside to form a midfield three during build-up, helping the team maintain possession.

The attacking contribution of a full back can be a game-changer. A full back who can cross well adds a whole new dimension to the team’s attack. For example, many top teams rely on their full backs to be the main chance creators, often providing more assists than the wingers.

Key Skills and Attributes

To play full back effectively, a player needs a specific blend of physical, technical, and mental qualities:

Pace and stamina: The position demands repeated sprints up and down the flank for 90 minutes.
Tackling and timing: The ability to win the ball without committing fouls is crucial.
Crossing accuracy: A good full back can deliver a variety of crosses—driven, lofted, or cut-back.
Positional awareness: Understanding when to push forward and when to hold back is vital.
First touch and passing: Under pressure, a full back must be able to receive the ball and pass accurately to keep possession.

These skills are not just natural; they are developed through hours of practice and tactical coaching. A full back must also be comfortable in one-on-one situations, both defensively and offensively.

Variations of the Role

Not all full backs play the same way. The role varies depending on the team’s system and the coach’s philosophy:

Traditional full back: Stays deep, focuses on defending, and only attacks on set pieces or when the ball is on their side.
Wing-back: In a back three/five system, the wing-back has more license to attack, often playing as a winger when the team has the ball.
Inverted full back: A modern trend where the full back tucks into midfield when the team has possession, creating a numerical advantage in the middle.
Full back as playmaker: Some teams use the full back as a deep-lying playmaker, dictating play from wide areas.

Each variation requires different skills. For instance, an inverted full back needs excellent passing and vision, while a traditional full back prioritises defensive solidity.

Common Mistakes and How to Avoid Them

Even experienced full backs make errors. Here are common problems and how to fix them:

Getting caught upfield: When the team loses the ball, the full back may be out of position. Solution: always be aware of the ball’s location and the opponent’s counter-attacking threat.
Ball-watching: Focusing too much on the ball and losing track of the winger. Solution: keep an eye on both the ball and your man.
Poor crossing decisions: Crossing when there is no target or when a pass would be better. Solution: scan the box before receiving the ball and choose the best option.
Not communicating with the centre-back: Leaving gaps in the defensive line. Solution: constantly talk to your defensive partners about positioning.

These mistakes are common at all levels, but they can be minimised with practice and video analysis.

How to Train as a Full Back

If you want to improve as a full back, focus on these areas in training:

Improve your fitness: Work on interval sprints and endurance to handle the constant up-and-down runs.
Practice crossing: Set up cones and practice delivering crosses from different angles and distances.
Work on one-on-one defending: Drill with a teammate to practice jockeying, tackling, and blocking crosses.
Study the game: Watch professional full backs and note their positioning and decision-making.
Develop your weaker foot: Being able to use both feet makes you less predictable and more effective.
Play small-sided games: These force you to make quick decisions in tight spaces, improving your composure.
Practice receiving under pressure: Have a teammate press you while you receive the ball and pass it quickly.
Work on your heading: You’ll need to defend crosses and occasionally attack them at set pieces.

Consistency is key. Full back is a position that requires a high level of fitness and technical ability, so regular training is essential.

Frequently Asked Questions

Is full back the same as wing back?

No, they are different. A full back is part of a back four and has more defensive responsibilities. A wing back plays in a back three or five and is expected to provide more width in attack, often acting as a winger when the team has the ball.

Why are full backs so important in modern football?

Full backs are important because they provide both defensive cover and attacking width. They create overloads on the flanks, deliver crosses, and support midfield, making them vital to a team’s shape and balance.

What is the hardest part of playing full back?

The hardest part is the physical demand. Full backs must sprint up and down the flank for 90 minutes, while also making quick decisions under pressure. The mental aspect of balancing attacking and defensive duties is also challenging.

Can a full back be a good captain?

Yes, many full backs have been successful captains. The position gives a good view of the pitch, and full backs often have strong communication skills, which are essential for a captain.

Do full backs score goals?

Full backs do score, but not as often as strikers or attacking midfielders. They usually score from set pieces, long-range shots, or by arriving late in the box during open play.

What is the difference between a full back and a centre back?

A full back plays on the flanks and has more attacking duties, while a centre back plays in the middle of the defence and focuses primarily on defending, winning aerial duels, and organising the back line.

Conclusion

The full back role is a blend of defence and attack, requiring a unique set of skills. Whether you’re a player, coach, or fan, understanding this position enhances your appreciation of the game. The modern full back is no longer just a defender but a key playmaker in the team’s system.

Sources: The IFAB Laws of the Game. Menus and buttons can differ slightly by version. Spotted something out of date? Tell us.