Already as is stance now Arsenal hope is only on the champions league right now, so is left for them to utilize their opportunities. Because is already sating that Liverpool owns the premier league title this season so there is nothing any of them can do about it. Because looking at what Arsenal did to Real Madrid in this their first leg they might likely be the winner of champions league this season if can be able to continue with the recent form.
This should be a good momentum for Arsenal to prove themselves in the Champions League because beating Real Madrid with a fairly promising score is a very extraordinary achievement, although in the second leg later they will be much more pressured to play at Real Madrid's home ground which is quite haunted for some teams who have experienced defeat there.
In the Premier League itself, Arsenal's chances of catching up on Liverpool's points are very small because Liverpool themselves certainly will not let the only title they currently have disappear just like that, so they will fight to get a full victory in the remaining matches.