Arsenal announced this week that manager Mikel Arteta has signed a new three-year contract at the club, in a massive boost for the future. Arteta had entered the final 12 months of his deal, and rumours linked him with Barcelona earlier this year. However, Arsenal and Arteta agreed a new three-year contract, which will see the Spaniard become one of the highest-paid managers in the world. He has helped turn Arsenal into a title-challenging team, after joining at a turbulent time for the club, and Arteta has the highest win rate out of any manager in the club’s history during the Premier League…