For Liverpool, there is at least recent history on their side. Kind of.
No-one, not even the most optimistic of their fans, gave them a chance when they were 3-0 down to Barcelona in that epic Champions League semi of 2019. But the miracle of Anfield duly unfolded.
This time, it’s even harder, because they trail to Real Madrid by the same deficit, and must attempt to overturn it in the Bernabeu. Impossible? Well that glorious night against Barca shows that anything is possible.