Confusion reigned on Wednesday night. In the white-hot heat of the moment, players, pundits and fans at Tottenham filming reaction videos on phones failed to grasp the intricacies of the offside law. Even the person helming the Guardian’s Champions League clockwatch – me – was very far from sure.
Could Harry Kane be adjudged offside if Emerson Royal nodded Ivan Perisic’s excellent deep cross backwards? Could Kane be offside if the ball flicked off a Sporting defender before being tucked into the net, seemingly earning Tottenham a stirring comeback victory and a place in the last 16?