They are so prepared for this game Arteta wouldn't want to miss out on this game again the following week would be a meeting with City at home to if they fail to win today they still have all it takes to loss the next. Meanwhile City are at the verge of points deduction once the case been concluded they will be be going down to eight points or nine in the premier league table
Arsenal will have to win the match against Brentford first, this is also not a very easy opponent, but the victory will be important for Arsenal, because after two defeats in a row they need to feel the taste of victory again.
If they still deduct points from City, it will be very bad and not only for City, which in this case will not even be able to be in the Champions League zone, it will be a loss for the Premier League, since such a strong opponent will simply be deprived of points and this may affect psychologically the players and the team as a whole.
I think that a more effective punishment would be to increase the penalty so that it is more significant than to deprive the team of points. But apparently the punishment is designed to leave the team without the Champions League for the next season, this is significant.