Wimbledon organizers have apologized and explained that “human error” was the reason behind the electronic line-calling system being turned off during a match on Sunday.

Sonay Kartal was knocked out of Wimbledon after her Russian rival claimed the British player got special treatment when the electronic line calling failed on Centre Court. Anastasia Pavlyuchenkova, 34, recovered to knock the last British female out of the singles 7-6 6-4.

It’s been another incredible run for Kartal, who reached the third round last year before falling bravely to Coco Gauff. Another victory today at SW19 would see the world No51 vault above both Katie Boulter and Emma Raducanu to become the new British women’s No1.