Will This Be the Last French Open With Only Human Eyes Minding the Lines?

“It is not a 3-D re-creation; we give the real image,” Simon said. “We see the surface of the court how it is, even if it has moved or just moved.”

This year, the U.S. Open became the first Grand Slam event to use almost exclusively electronic line calling, eliminating line umpires on all but two of its courts. Initial feedback was positive, according to Stacey Allaster, the tournament director, but the U.S. Open has yet to commit to using the same system in 2021.

Electronic line judging would most likely eliminate one current issue: umpires examining the wrong ball mark on the clay, which is a frequent source of tension with players. But if there is a switch to electronic calls, players will still be able to see the mark on clay, and it will not always match what technology records.

“The ball mark can be larger or smaller

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