Inigo Martinez is another centre-back who would fit the bill of what Arsenal need. With Thomas Vermaelen looking likely to depart the club, Inigo would act as backup to Mertesacker and Koscielny. The Sociedad centre-back is also young enough to eventually take over responsibility for one of the two on a permanent basis. Inigo has drawn criticisms over the past year or so, but his talent is clear. Moreover, his technical qualities would make him a good addition to the Arsenal squad. He’s a fearless defender who should, in theory, adapt well to the Premier League.