CENTRE COURT, THE ALL ENGLAND CLUB — Anastasia Pavlyuchenkova suggested her British opponent may have received preferential treatment as simmering tensions around Wimbledon ’s use of electronic line calling (ELC) instead of line judges boiled over Sunday, when the technology malfunctioned at a crucial point on Centre Court.

Wimbledon organisers have issued an apology after a human error led to the electronic line-calling system missing three calls during a crucial game.

The simmering tensions around Wimbledon’s use of electronic line calling (ELC) instead of line judges boiled over Sunday, when the technology malfunctioned at a crucial point on Centre Court. Russia’s Anastasia Pavlyuchenkova was serving at 4-4,