The sign of any great coach is the ability to improve a player. The likes of Pep Guardiola, Jurgen Klopp and even Marcelo Bielsa have all had that uncanny knack of making players who work with them that much better. Mikel Arteta is a manager who is hoping to be considered among the best of the best in the coming years, and he’s well on his way. Indeed, the Spaniard has done a fantastic job at Arsenal, cultivating a positive atmosphere and playing great football, while he’s also improved a number of his players. Speaking on The Game Football Podcast, Tony Cascarino has been discussing the job A…