An Electronic Line Judge is a technology used in Tennis for the callings i.e., when the ball hits the outer parts of the court. It enables the umpire to take a fair decision in the match whether the ball has landed on the court or not. This technology was introduced in the year 1970 by Geoffrey Grant, an avid tennis player, and Robert Nicks, an electronics engineer. The technology was successfully used for the first time in 1974 at a professional tennis tournament.
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