The 2014 World Cup in Brazil will use a hi-tech system to work out whether a goal has been scored in the tournament.
Goal-line technology (GLT) uses electronic devices to determine whether the ball has completely crossed the line. Fifa made an announcement on Tuesday that this technology would be used during next year's World Cup and firms have been asked to tender for the contract.
There are four systems Fifa could choose to use in its World Cup matches and the organisation is expected to select one by early April. This could mean the technology is trialled first at the Confederations Cup in Brazil this summer.
Fifa has already tested out the systems Hawk-Eye, which uses cameras, and GoalRef, which uses magnetic fields, during the Club World Cup in December. Both had already been given global licences by the international governing body for football.
Another system called Cairos, which uses similar technology to GoalRef, has also been tested by Fifa and is expected to be licensed next week. It is not yet known whether the fourth system, which has not been named, has made it past the testing stage.
Fifa said GLT would help match officials make their decisions at the two tournaments in Brazil, which are expected to attract football fans from around the world.
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