
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.