Although deadline day was a qualified success for Arsenal, who were able to sign Raheem Sterling at the eleventh hour, the Gunners still failed to secure one of their key targets. Heading into the final day of the window, Arsenal were thought to be targeting three new signings to improve Mikel Arteta’s squad depth. The first arrived in the shape of Bournemouth goalkeeper Neto, an experienced 35-year-old who is happy to play second-fiddle to David Raya. Then, Arsenal’s priority was to find an attacker to add ‘x-factor’ to Arteta’s forward line. And when it became clear that Arsenal could send R…