Mikel Arteta is standing on the brink of greatness. If Arsenal win the Champions League and complete a Double with the Premier League title, it will surely go down as the greatest achievement in a single season by a manager in the club’s history. That would elevate Arteta even above the likes of Arsene Wenger, George Graham, Bertie Mee and Herbert Chapman in terms of European success. And from there, Arteta would have the incredible opportunity to create an era of success and leave a legacy