In association football (soccer), a ghost goal (or phantom goal) is a questionable goal, usually involving uncertainty as to whether or not a ball crossed the goal line. A ghost goal can be awarded without the ball ever crossing the goal-line and, conversely, the term can be applied when the ball crosses the goal-line unseen by the referee. In an attempt to combat the issue of ghost goals, new rules allowing goal-line technology were passed by IFAB in 2012 and have consequently been introduced for some football competitions, including the FIFA World Cup, FIFA Club World Cup and Premier League.
In Germany, the term "Phantomtor" usually refers to a Bundesliga "goal" awarded to Bayern Munich player Thomas Helmer in April 1994 against 1. FC Nürnberg, as his team scraped to a 2–1 victory. It was an error of judgement by the match officials, as the ball missed the goal and instead went over the byline. The goal directly influenced the outcome of the competition and led to an official objection by FIFA because the German Football Association ordered the result to be annulled and the game to be replayed. A re-match eventually took place and Bayern Munich ran out 5–0 winners.
The term in the English language arose from a quote by Chelsea manager José Mourinho, following a 2004–05 UEFA Champions League semi-final against Liverpool, ultimately decided by a single goal by Luis García, awarded by referee Ľuboš Micheľ, but dubbed a "ghost goal" and described as "a goal that came from the moon" by Mourinho.