Why Goals Get Ruled Out for Offside in the Build-Up

Updated · 6 min read

The frustration often stems from the gap between the offside event and the final shot. While fans focus on the immediate buildup, the video assistant referee tracks the chain of possession back to the point where the attacking team gained control. This process creates a forensic look at the play that live officials simply cannot replicate in real-time, leading to the retroactive cancellation of goals that seem perfectly valid to the naked eye.

Quick facts

FactorImpact on Review
Phase durationUnlimited time
Review scopeStart of possession
Offside triggerMoment of pass
VAR thresholdClear and obvious

How does the Video Assistant Referee (VAR) protocol define the 'attacking phase of play'?

The attacking phase of play begins when the attacking team gains possession or starts a sustained attack, continuing until the defense clears the ball or the ball goes out of play. VAR protocols examine this entire period, which can span over 60 seconds of game time before a goal is scored.

What specific criteria determine when a defensive team gains 'controlled possession' to reset an offside check?

To reset an offside check, the defense must secure controlled possession, meaning a player has the ability to pass, dribble, or clear the ball with a deliberate touch. A simple touch that ricochets off a defender does not count as establishing control. A lot of people assume that any touch by a defender resets the offside count, but the laws specifically require a deliberate action that gives the defender time to make a decision. If the ball merely strikes a defender’s foot while they are attempting a block, the original attacking phase remains active.

How has the introduction of semi-automated offside technology impacted the duration of goal reviews?

Semi-automated offside technology has significantly reduced the time taken for reviews by using tracking cameras to pinpoint the exact moment of contact.

  • 25 seconds is the approximate average time now required for an offside check, down from over 70 seconds in early VAR implementations.
  • 29 data points are tracked on each player's body by the system to create a precise skeletal model for offside determinations.
  • 50 frames per second are captured by the specialized cameras to make sure the exact moment of the ball being played is identified accurately.
  • 12 dedicated cameras mounted under the stadium roof track the ball and every player to generate automated alerts for the VAR officials.

At what point in a sequence of passes does an offside offense become punishable under current IFAB laws?

An offside offense becomes punishable at the precise moment the ball is touched or played by a teammate. If an attacking player is in an offside position at that exact instant, they are penalized if they become involved in active play. For example, if a midfielder plays a through ball, the offside status of the forward is frozen at the moment the boot makes contact with the ball, regardless of where the forward moves afterward.

A key nuance exists regarding the "second ball." If a shot hits the post and rebounds to an attacker who was offside when the ball was initially played, they are still penalized. However, if a defender makes a deliberate attempt to play the ball and miskicks it, the offside status of the attacker is reset, creating a new phase of play that nullifies the original infringement.

What are the primary differences between 'interfering with play' and 'gaining an advantage' in the context of VAR interventions?

These terms distinguish between direct physical involvement and benefiting from a position after a rebound or save.

  • Interfering with play occurs when a player touches the ball passed or touched by a teammate, directly impacting the immediate movement of the ball.
  • Gaining an advantage applies when a player touches a ball that rebounds off a goalpost, crossbar, or match official while they were previously in an offside position.
  • Physical contact is not required for an offense; a player can be penalized for blocking an opponent's line of vision or challenging for the ball.
  • Defensive saves are excluded from the "gaining an advantage" rule if the defender makes a controlled, deliberate save that keeps the ball in play.

How do officials distinguish between a deliberate play by a defender and a deflection when evaluating offside sequences?

Officials evaluate whether a defender had time and space to control the ball before it moved to an attacker. A deliberate play requires the defender to have a clear view of the ball and the ability to make a calculated movement, such as a controlled pass or a purposeful clearance. If a defender is reacting to a fast-moving ball with a reflexive movement, it is classified as a deflection rather than a deliberate play.

For instance, a defender attempting to head a cross away is making a deliberate play. If the ball hits their head and falls to an opponent, the offside is reset. Conversely, if a ball strikes a defender's arm while they are sliding to block a shot, this is a deflection. The nuance is that a deflection does not reset the offside, meaning the attacker remains liable for their original position at the start of the sequence.

What limitations exist regarding how far back in time VAR can look to identify an offside infringement?

No, there is no fixed time limit on how far back VAR can look for an offside offense. The review window is determined by the start of the attacking phase, which can extend back through multiple passes or even a change in possession if the attacking team immediately regains control.

Common mistakes

  • Assuming the clock resets. Many believe a sequence resets after a certain number of passes, but the phase continues until the defending team gains clear control of the ball.
  • Ignoring the initial pass. Fans often look at the final touch before the goal, yet the offside violation frequently occurs at the very start of the attacking move.
  • Confusing live calls with VAR. People expect the same speed as an on-field assistant, but VAR is designed to prioritize accuracy over the immediate flow of the match.

How does the 'clear and obvious' error threshold apply to offside decisions made during goal-scoring build-ups?

The 'clear and obvious' threshold does not apply to offside decisions because these are considered factual, binary outcomes based on the exact moment of contact.

MetricOffside DecisionSubjective Foul
BasisFactualInterpretive
TechnologyAutomatedManual
ThresholdNoneClear and Obvious

Use these categories to determine if a review will be brief and data-driven or involve a lengthy monitor consultation.

Understanding the attacking phase

Focus on the moment the attacking team regains possession to anticipate potential offside reviews. Tracking the start of the sequence provides a much clearer picture of why a goal might be pulled back by the officials.