While sitting top of the Premier League table, Arteta concedes there's some weaknesses in his squad.
Ahead of their massive clash with Aston Villa, Arteta said: "I don't know, we're going to be really, obviously, aware of the situation and the timescale of certain players, if going from the front line then to the back line, but that's the depth that you need, and when you look across the other clubs as well, they have 24, 25 squad players, and so there's nothing especially in our squad.
"The thing is that although we have more injuries than expected, some of them not avoidable I would say, but we want to be better and we know how important the part of having the right availability with players going to play in this season.
"Depending, as I said, on the availability of certain players, so the window is there, I mean, we're Arsenal and we have to be looking at it, OK, ‘What do we need?’ And we have to be actively looking, and then can we do it or not, that's a different story, but our job is to be always very prepared because something can happen, so hopefully very positive."