Arsenal have sold or released a lot of players in Mikel Arteta’s time at the club, and they have enjoyed mixed successes since leaving the Emirates. Some players have gone on to shine elsewhere despite not making the grade at Arsenal, such as goalkeeper Emi Martinez, whilst others saw their struggles continue, with Nicolas Pepe recently suffering a disaster in the Turkish Cup final for Trabzonspor. A player who like Pepe, left Arsenal permanently last summer was Matt Turner. The USMNT goalkeeper spent just one year at Arsenal before moving to Nottingham Forest in a deal worth £7m, as Arteta br…