I really understand that Porto's defense is very strong. At least Mikel Arteta can find a gap to score a goal in the second leg to advance to the next round. Even though Porto is in third place in the Portuguese League, that cannot be a benchmark for measuring the strength of a club. However, here you can see or find out who will be lucky in the second leg, hopefully Mikel Arteta can find Porto's weak points so they can win or turn things around.
To be quite honest, I was really aback by Porto's performance thus far this season considering how difficult even their most recent game against Arsenal was. Arsenal worked very hard to produce results, but the Porto defense prevented it from happening. They perform effectively in front and have robust defenses.
As you previously stated, I believe it would be preferable if Mikel Arteta could rationalize, improve Arsenal, and lead his team to a victory in order to qualify for the following round. That is, if Arteta was able to counsel the fans. In addition, I am aware of Arsenal's capabilities, that they can perform well and produce out a positive results.