![]() ![]() In the past, he says, when a player challenged a line judge's call and it was reviewed through the Hawk-Eye system, the human turned out to be correct about 75% of the time. SEAN CARY: We're providing the players a fairer playing field, with a lot more integrity, a much higher accuracy call.īLOCK: That's Sean Cary, who oversees officiating at the U.S. Tournament officials thought it worked so well that now they use it exclusively. Open eliminated nearly all line judges, using instead the optical technology called Hawk-Eye Live. In 2020, to minimize the risk of infection, the U.S. MELISSA BLOCK, BYLINE: Turns out, it all started with COVID. Well, that got NPR's Melissa Block curious to find out more. They've been replaced by optical technology, and the calls are all prerecorded. You will not see any actual human beings on the court making those calls, because there are no more line judges at the U.S. ![]() ![]() If you're watching at home and you hear this. Open tennis tournament wraps up with final matches this weekend. ![]()
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