It has been one of the most entertaining weeks of European football; despite the presumption that most ties in this week's Champions League appeared well and truly done.
Well, not to be undone, the Europa League has tonight thrown up some surprises also.
Marseille looked set to undo a 2 goal deficit against RB Leipzig, Arsenal took what appeared to be a comfortable 4-1 lead to Moscow, only for their plans to be well and truly scuppered.
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Having fallen a goal behind at the tail end of the first half, a parried effort from Petr Cech allowed Kirill Nababkin to capitalise and give CSKA a 2-0 lead on the night.
With the tie now poised at 4-3 in Arsenal's favour, CSKA will know that one more goal is enough.
You can see both of their goals below.
1-0
2-0
