It is a sad day when you have to rely on Danny Welbeck to have a world class game for three points, but that day is here for Arsenal.
It is pretty safe betting that they will concede at least one goal, so to come away with anything at all, they have to find the back of the net.
Given Welbeck is their forward, he simply must do this in order for them to even have a hope of progressing from their group.