Fine margins. A little more than five years ago at the Etihad, John Stones belted a clearance into Ederson and then, as it rebounded towards the line, lunged to hook the ball away. Had it gone in? Liverpool appealed. The referee Anthony Taylor looked at his wrist monitor. No goal. The Goal Decision System ruled the whole of the ball had been 11.7mm from crossing the whole of the line. Liverpool were denied an opener, went on to lose 2-1 and their lead at the top of the table was cut to four points. Pep Guardiola went on to win his second Premier League title.
In that same game, Sadio Mané had a shot that hit the inside of the post and stayed out, while Leroy Sane’s winner hit the inside of the post and went in. In either case, 11.7mm might have proved decisive, changing the angle at which the ball came off the upright, but it was the goalline technology that is remembered. Refereeing decisions have a habit of lingering in the mind (even when, despite what some claimed in the moment, using shadows and theoretical geometry and pouring scorn on ballistic experts with the conviction of Jim Garrison dismissing the magic bullet, the decision is manifestly correct).
