In soccer, there are various debates and controversies about whether the ball crosses the goal line, mistakes made by referees. But the most controversial incidents have been about goals in recent years. One of the best solutions to these problems is Goal Line technology. This method is used to determine when the ball has slightly crossed the goal line with the assistance of electronic devices and at the same time assisting the referee in awarding the goal or not. The objective of GLT is not to replace the role of the officials, but to support them in their choices. .
The question of the inclusion of this system was raised in the year 2000, due to a penalty shoot-out in the African Cup of Nations Final after a player from Nigeria was denied a goal by the referees, but TV replays suggested that it had actually crossed the line. Interest was ignited in the United Kingdom when Manchester United keeper Roy Carroll caught the ball and dropped it at least a yard over the goal line, hitting it back out instantly. Neither the referee nor the linesmen saw this and this raised a big question in the world of soccer. .
Due to this, FIFA decided to test a system by Adidas in which the soccer ball contained a microchip, which would assist the referee if it crossed the line, or not. Unfortunately, this system was dismissed since the evidence wasn't a 100% clear. Another incident occurred in 2009, in the English Premier League and there was one more huge controversy. Finally, there was a vote from 48 captains of different clubs, and 90% said they wanted Goal line technology. Following several errors made by officials in the next few years, FIFA president Sepp Blatter agreed to use this system. .
The first official testing of Goal line technology came in Japan for the 2012 FIFA club world cup. After the tournament, the system came in handy and it went in for a Final Installation Test before it can be used on a big stage.
