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WEKU
WEKU
Melissa Block

At the U.S. Open, line judges are out. Automated calls are in

Rajeev Ram and Joe Salisbury return a shot against Neal Skupski and Wesley Koolhof during their Men's Doubles Final match on Friday at the U.S. Open. (Al Bello/Getty Images)

At the 2022 U.S. Open tennis tournament, which wraps up this weekend in Flushing Meadows, N.Y., technology has won: game, set, match.

Human line judges at the tournament have been entirely replaced by optical technology to determine whether balls are ruled in or out. Immediately after impact, a recorded voice shouts out the call: "FAULT!" for a wayward serve; "OUT!" for a ball that lands long or wide in a rally.

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