When the season comes to an end, Arsenal will only have themselves to blame for their lack of success. While it is true that the Gunners have been plagued by injury all season, their defence has cost them dearly; the mix up between Koscielny and Szczęsny in the League Cup final will be remembered for years to come.
Next season, Arsenal have the return of Vermaelen to look forward to; the Belgian was an imperious presence in the Gunner's back last season, netting seven goals in 36 appearances, but it would be a mistake to assume that his return will be enough to ease their frailties.
Vermaelen, despite being a tall, commanding and physical centre back is prone to finding himself out of position; mostly because of his desire to get forward. This however should not be driven out of his game, instead it is essential that Arsenal sign a deep lying, sweeper like centre back to partner him in front of Szczęsny- or dare I say it, Stekelenburg?
Although Johan Djourou has proven himself to be an able centre back—certainly good enough to remain at the Gunners—he is a little injury prone. Koscielny and Squillici are not good enough backup options. Arsenal's goal keeping crisis has been well documented, but any keeper, nor matter how good they are, would have their work cut out for them with the two French centre halves playing in front of them.
Arsenal needs at least one quality centre back to ease their defensive woes.
This is a short list of potential transfer prospects that Wenger may be able to lure to the Emirates.