The goal-line referee is responsible for judging infringements of the rules in the goal area for supervising penalties and corner throws and for watching the movements of the goalkeeper.

球门裁判员的职责是判断球门区的犯规，监督执行罚则和掷角球，并且观察守门员的动作。

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The goal-line referee is responsible for judging infringements of the rules in the goal area, for supervising penalties and corner throws and for watching the movements of the goalkeeper.

球门裁判员的职责是判断球门区的犯规，监督执行罚则和掷角球，并且观察守门员的动作。

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Valencia coach Unai Emery was sent off for protesting against the decision, with Zigic running over to the goal-line referee to show off his shirt, which had an enormous hole across his chest.

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Then came the controversial moment when Lampard's strike from the edge of the penalty area struck the underside of the bar and bounced down about two feet over the goal-line, only for Uruguayan referee Jorge Larrionda and his assistants to fail to award a goal.

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If the system detects that the ball has crossed the goal line a central computer transmits a signal to the referee via either a watch or earpiece.

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