FIFA and UEFA have spent the past three years testing out a new artificial-intelligence-based semi-automated offside technology (SAOT), and now it's ready to be rolled out in the Champions League.
Although SAOT was used by FIFA at the Club World Cup in February, and also by UEFA in the Super Cup between Real Madrid and Eintracht Frankfurt in Helsinki last month, most fans wouldn't even have noticed it was there. You could say that's the perfect outcome, but until we regularly see the new technology is changing offside decisions we're in the dark as to its effectiveness.