In fact, Porto was able to beat Arsenal in the first leg thanks to their far more experience playing in the UCL than Arsenal. So it is not surprising if Porto can overcome a team as strong as Arsenal in the first leg. But I am also confident that Arsenal will eventually progress to the next stage. Because Arsenal has also recently had an increase in goal productivity. And Arsenal have also strengthened their defense more recently. Even in the match against Brentford, we could actually see Arsenal almost completely controlling the match. And Brentford even they continue to struggle to get out of the pressure. It's just that Brentford's defense is also very solid. So Arsenal were having quite a difficult time. But in the end Arsenal still won. I am sure that in the Arsenal vs Porto match there will be more than 2 goals and I hope Arsenal will score 3 goals. This seems excessive but we'll see whether Arteta's troops can be relied on at home or not.
Speaking of experience, of course Porto is still better than Arsenal in the Champions League, because as far as I know Porto is the only club from Portugal that won the Champions League with Mourinho in 2004, while Arsenal's best achievement was only reaching the final in the Champions League in 2006, but of course we cannot make a benchmark if Porto is better than Arsenal now because indeed both teams have had very changes Significant and even after the Mourinho era ended in Porto, Porto continued to struggle to reach the last 16 of the Champions League.
Nowadays we are talking about modern football where before the long whistle is sounded by the referee in a match then all possibilities can happen including when Arsenal against Porto in the second leg later, so far a victory with an aggregate of 1 goal is not safe enough for a team to secure their position in the second leg and I think Arsenal will probably follow what Bayern Munich did when they could win from Lazio in the second leg while The first leg Munich actually had to lose 1-0 to Lazio, and I think Munich's condition at that time was not much different from Arsenal.