Arsenal collecting 18 points from their first seven league games and are currently at the top of the Premier League table shows how serious they are this season. I think everybody says Arsenal's top priority should be a top-four finish. But I see beyond that. Arsenal have always performed like this in some seasons ago but inconsistency breeds in and what causes that is injuries to their first team players; first team players that cannot be replaced by anyone on the bench. With the way they’ve been playing, and with a complete squad, I don’t think big teams will be a problem for them.
Arsenal lack second tier players on par with the first squad, I'm sure Arteta has figured that out. and that's why, the Gunners will find it difficult to play their next matches in the premier league. several players suffered injuries, as a result Arsenal lost against Manchester United at that time.
I do not doubt the greatness of the squad made by Arteta with his young squad. however, in order to continue to play optimally Arteta requires several new players. maybe in the next transfer window, Arteta will bring some players to the Emirates Stadium.
At the moment Arteta's target is clear, only to finish in the top four of the Premier League. and if Arteta can lead the Gunners squad to a title win this season, I think that would be a great achievement.