The transfer window has only just closed, but Arsenal already have eyes on what they could do next summer. Indeed, the Gunners do still have some gaps to fill in their squad next summer. Mikel Arteta’s side still need a new striker, which is why Arsenal have been strongly linked to Benjamin Sesko, but there are a couple of other problem positions that could prove to be an issue next summer. Indeed, with Raheem Sterling and Neto only at the club on season-long loans, Arsenal will have to re-address their wide areas and goalkeeping positions next summer. Arsenal have been linked with Antoine Sem…