There is one weakness that Arsenal actually has in the UCL, namely that they lack experience. Because they have always failed to qualify for the UCL for a long time. And thanks to Arteta this season Arsenal are in the UCL. It's just that Porto has far more experience in the UCL than Arsenal. But still, in terms of performance, Arsenal is very superior to Porto. So I also believe that in the second leg, the troops built by Arteta will be able to break into Porto's goal with more than 2 goals. And I hope Arsenal can progress to the next stage. Because if Arsenal fails in the round of 16 then it will be quite a big surprise for me. Because Porto is the favorite team and Arsenal should be able to overcome Porto with the performance they are currently having.
How can you say that Arsenal lacks experience, they have fought quite a lot in the Champions League, but Arteta has never brought Arsenal the UCL trophy. when facing Porto last time, Arsenal controlled the ball up to 65% but they couldn't make even 1 shot on goal, while Porto succeeded in making 2 shots on goal and 1 became a goal, Porto had a good defense while Arsenal was not very able to withstand Porto attacks, here the strategy used by Arteta is not effective, in the second leg, hopefully, Arteta will improve Arsenal's defensive line, this is the most important thing imo.
I admit that perhaps Porto experience in winning the UCL title is far superior to Arsenal, which has never had any experience except being runners up in the past.
the problem is that this has been happening for a long time, all the conditions of the two teams are different and Arsenal is currently more consistent in terms of maintaining the performance of the players, but still all this does not provide a guarantee that Arsenal will easily beat Porto.
everything we are talking about here is just a prediction, but if we predict in more depth, the result is actually a draw because these two teams actually both have quite strong performances and competing at home also doesn't provide any guarantees.
but the most important thing now is that Arteta must try harder to qualify and make good use of this opportunity and winning 1 aggregate point is much better.