Former Arsenal winger Theo Walcott believes he has spotted a change in Mikel Arteta’s behaviour this season. Mikel Arteta has grown and evolved as a manager in his time at the helm at Arsenal. When the Spanish coach was first handed the reins in December 2019, taking on his first ever managerial role, he took over a club in crisis. At that point, the Gunners were something of a mid-table side, having fallen away from the Champions League reckoning, and there was a toxic rift between the club and the supporters. Arteta was able to re-energise the club, and has made Arsenal genuine title contend…