There has been something of a sea-change over the past few days.
Immediately after the final whistle of the first leg against Monaco there was despair everywhere you looked.
Fast forward a few weeks after a run that has seen Arsenal win all of their games, including an away trip to Manchester United, and the mood is decidedly different.
Add into the mix the players issuing rallying calls and generally saying that they believe they can do it and you are left with a fanbase that is feeling more and more like Arsenal can defy history and make the quarter finals.
But can they?
Or are we all just being swept away in a tide of optimism that overruns common sense?
What do you think, can Arsenal progress on Tuesday night? Perhaps, more importantly, will they?