A great piece by Jonathan Wilson about the logic of the away goals rule in European football:

This is the first problem with the away goals rule: it simply isn’t fair. It makes certain goals count for more than others. When M’Baye Niang’s shot hit the post at Camp Nou he was effectively denied not a goal but a goal and a half. If that generated good football, made games more exciting, then perhaps the inherent illogicity of the rule could be tolerated. But it doesn’t. In fact, it achieves precisely the opposite of what it set out to do.