Arsenal main focus at the moment is to improve their game, indeed so far Arsenal performance in the league has been very good and managed to score many goals, but for the Champions League it seems that they must be able to improve their mentality and performances to be even better because the competition in the Champions League is tighter, currently the Champions League League leaves a strong and experienced team, So Arteta should have used the experience against Porto as a lesson, I think Porto was a slightly weak team in the last 16 yesterday but Arsenal had to work hard enough to beat him and get here, and now they are awaited by a team that is maybe 3 times stronger than Porto.
At the moment Arsenal should not talk about trophies or even qualify for the final, because indeed their position is a little difficult and better for Arsenal to continue to focus on improving their performance ahead of the quarter-final match later, because surely Arsenal will also not be able to avoid big teams like Manchester City and Madrid in the Champions League in drawing later.
all of this depends on Arteta as the coach who manages Arsenal to be able to maintain the physical and fitness of the players and as long as Arteta can rotate players very wisely, Arsenal will certainly be a little more likely to continue to advance to the final round, but I'm not sure.
In this quarter final round, all the teams that qualified were big teams with very good quality performance and quite good experience, but even so, Arsenal still had the opportunity to get a ticket to the final round even though they had to play a difficult match.
and on the one hand it is true what you say that all of this will also depend on the draw of the opponents in this quarter final round because if they face a team of higher quality I am sure Arsenal will fail in the quarter finals this time.