Wimbledon organisers have apologised after the electronic line-calling system on Centre Court was turned off in error and missed three calls in one game.

Anastasia Pavlyuchenkova said a game was ‘stolen’ from her after there was no ‘out’ call when a Sonay Kartal backhand went long in the first set of their fourth-round match.

The Russian stopped after seeing the ball go long, and chair umpire Nico Helwerth halted play.

The All England Club initially said the system was “deactivated on the point in question” because of “operator error”.

A spokesperson said later on Sunday that, after further investigation, it was found that the technology was “deactivated in error on part of the server’s side of the court for one game”.

During that time, three calls on the affected side of the court were not picked up.

Helwerth – who did not know the system had been turned off – called two of them himself before the incident highlighted by Pavlyuchenkova.

“We have apologised to the players involved,” a spokesperson for the All England Club said.

“We continue to have full confidence in the accuracy of the ball tracking technology.

“In this instance, there was a human error and as a consequence we have fully reviewed our processes and made the appropriate changes.”