Arsenal will not be rash when hosting PSG tonight they will be quite careful in this first leg match because they are important to win especially in a large number of goals.
I think in the first leg if the result is a draw then the possibility of Arsenal will be difficult in the second leg at home to PSG, so as much as possible Arsenal must win tonight at least it would be better.
Again Arsenal is Arsenal and they lost at their home stadium, and even result is only 0 - 1, it's disappointed result for them. Arsenal actually faced with a bigger defeat but they were lucky because PSG players wasted some opportunities to expand it to like 0 - 2 or 0 - 3. Perhaps this minimal defeat will make a second leg more exciting and Arsenal will feel they still have chance in Paris.
With PSG, hopefully they won't pay expensive cost by opportunites wasted in this first leg, but again PSG for another time move closely to UEFA Champions League final match.
Haha It's hard to express the disappointment last night that Arsenal couldn't equalize even if it was only 1 goal, after Merino's goal...I shouted but the result was checked by VAR and it was disallowed because it was deemed offside.

Arsenal also had several chances to score but were always denied, but in this match PSG had more chances than Arsenal.
Do you believe that later in the second leg Arsenal will rise? I see PSG is much tougher at home.
I don't think Arsenal will turn things around next week. When they beat Real Madrid, it was just a lucky day, nothing more. Yesterday, they showed their true level in the Champions League. They’re a good team, but they don’t wear the champion’s cap.
As for PSG, they’re similar to Arsenal, but at least from what I see, they seem more motivated. Luis Enrique has finally achieved a level of harmony in the squad that wasn't possible with Mbappé present. Yes, PSG are tougher at home, and I believe they’ll score again.