How Electronic Line-Calling Quietly Ended a Century of Tennis Tradition

Electronic line-calling systems have now replaced human line judges at nearly every major tournament, ending a century-old tradition and, with it, one of the sport’s most reliable sources of on-court controversy.

Camera-based electronic line-calling systems, which track ball position with far greater precision than the human eye, have now been adopted at nearly every major tournament, replacing human line judges who for more than a century made real-time calls on whether a ball landed in or out.

Players have generally welcomed the change, since the technology eliminates the disputed line calls and heated on-court arguments with officials that were once a routine, if often entertaining, part of nearly every match, replacing them with an instant, unchallengeable automated call.

Something in the theater of the sport has been lost too

Longtime fans and some commentators have noted a genuine, if minor, loss of drama and theater that came with a player passionately disputing a close call, an element of unpredictable human tension that the technology, for all its accuracy benefits, has effectively removed from the modern match experience.

“The calls are more accurate now than they’ve ever been. They’re also a lot less interesting to watch play out.”

With accuracy benefits clearly outweighing the nostalgia for on-court disputes among most players and tournament organizers, the technology’s continued expansion to essentially every remaining major event appears all but certain, marking a quiet but definitive end to one of the sport’s oldest human-officiated traditions.