Arsenal were dumped out of the Europa League and deservedly so. To think it was at the hands of Unai Emery, the man who wasn't good enough to avoid the sack, adds a layer of irony that twists the knife in our guts.
In no uncertain terms, the club's season very much rests on the Europa League and anything but success would spell trouble both in the short and possibly long term too.
Arteta and his staff can consider this first leg something of a let-off but it's a courtesy they won't be afforded again. Play like this next week and it's season over.