So far, Arsenal's obstacle is a pure striker who can be relied on by the team, unfortunately Arteta has not brought him even though he is actually their need. Talking about Arsenal in the Champions League, I don't have much hope. However, if Arsenal's players recover from their injuries as a whole. I am quite sure that every team that meets Arsenal will have a hard time facing their resistance. Although, they do not have a very qualified number 9 player.
Not every team needs a number 9 to be winning their games. Arsenal last season played very well without any number 9 in the team. Arteta knows how to play without a pure 9. Havertz can play as a top striker when Arteta wants to use a front man and Gabriel Jesus is used as a forward when he's fit. Arsenal has a strong team but it is injured that is making them to be weak. Arsenal do not have a strong force in the champions league, it is only the premier league that they are very strong and can be capable of challenging Manchester city until the final day of the league. The last game Arsenal had in the premier league against Manchester city, it ended 2-2 and Arsenal had only 10 players on the pitch by the end of the match. This is to show how strong the Arsenal team are when it involves the league title.