The AI-enhanced electronic line-calling (ELC) system at Wimbledon, Hawk-Eye Live, replaced line umpires this year but has been making errors on court.

Yesterday (6 July) on Wimbledon’s Centre Court, Russia’s Anastasia Pavlyuchenkova played the UK’s Sonay Kartal in the fourth round of the women’s singles.

In the first set of the match, Kartal hit a ball long but ELC failed to register it.

Television replays showed that Kartal’s shot was clearly out, yet the chair umpire ruled that because the technology had not tracked it, the point needed to be replayed.

Kartal went on to win the point but had the ball been called out, Pavlyuchenkova would have won the point and taken the game.

Three further calls were missed by the system on the same side of the court during the game.

In a statement by the All England Club later in the day, organisers admitted that, after further investigation, it was found that the technology had been “deactivated in error on part of the server's side of the court for...