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ShareHow Replay Works at the US Open
Wall Street Journal
When a player on Arthur Ashe Stadium at the U.S. Open doesn’t like a line call and signals for a challenge, a replay booth in the stadium’s upper broadcast area springs to life. Representatives from Hawk-Eye, the company that oversees the digital-camera-enabled challenge system, along with a tennis official, activate the replay and display it on the stadium’s display board.
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