How Electronic Line Calling Works in Tennis

Electronic line calling uses high-speed cameras to track the ball and determine whether it landed in or out.

It began as a review tool and is now used for live calls at many professional events.

How it works

Multiple cameras placed around the court track the ball's position. Software combines the images to calculate the ball's trajectory and landing point.

Accuracy

Systems are tested and certified for accuracy. They have a small margin of error, which is typically smaller than human line judges.

Live calling

Some tournaments now use electronic calls instead of human line judges, with automated voice calls.

Challenges

Where systems are used only for review, players may have a limited number of challenges per set.

Other sports

Similar ball-tracking technology is used in cricket and goal-line systems in football.

This is general sports information and commentary. Rules, schedules, and records change — check official league, federation, and event sources for the latest details. Consult a qualified coach or medical professional before starting a new training programme.

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