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.