Arsenal actually created more chances than Inter Milan, but Arsenal could not take advantage of the chances they got into a goal, so they had to accept defeat from Inter Milan who almost did not record a shot that could lead to the target, their clean chances were only obtained through the white point and that managed to make Arsenal have to admit defeat in this match. It is indeed quite difficult, because the team from Serie A is famous for their tough defense and in this match Arsenal had to feel that. This was their first defeat in the Champions League and it was indeed detrimental to them because they could not get 1 point in this match and that made them have to get out of the top 8.
Inter actually had no intention to win the match, they park the bus in order to prevent Arsenal to score a goal. Luckily Arsenal made mistake and Inter get a penalty kick, it strengthen them to retain the point till the match end.
In order to beat Italian defense, they need to have tall strikers, while almost all Arsenal's strikers are short like Trossard, Saka, Martinelli and Jesus.
Liverpool is the only club to achieve perfect points so far with 0 defeats and 0 draws, which is an extraordinary result, below them are Sporting, Monaco, Brest and Inter who have also not experienced defeat but have drawn 1 time. Meanwhile, for the strong candidates from previous seasons such as Real Madrid, Man City and Bayern Munich, they did not achieve perfect points, as UEFA has said that with this new format, the UCL competition is getting tighter because the favorite clubs get equal opponents and it turns out that the strong candidates seem to have difficulty facing the UCL this season.
No doubt Liverpool looks very solid, they almost unbeatable in this season. Another one is Barcelona, even they lose against Monaco, but I see they're second strongest in this season.