Why don't we trust technology in sport?
For a few minutes on Sunday afternoon, Wimbledon's Centre Court became the perfect encapsulation of the current tensions between humans and machines. When Britain's Sonay Kartal hit a backhand long on a crucial point, her opponent Anastasia Pavlyuchenkova knew it had landed out. She said the umpire did too. Television replays proved it. But the electronic line-calling system - which means humans have been fully replaced this year following earlier trials - remained silent. Minutes ticked by.