Arsenal’s recent defeats to Aston Villa and Bayern Munich have raised questions about Mikel Arteta’s squad management, and he needs to make a key change. The Gunners embarked on a remarkable 11-game unbeaten run in the Premier League after returning from a mid-season trip to Dubai, and looked fully fresh as they dismantled teams with ease. However, a busy April fixture list has now caught up to Arsenal, and some key players, and Bukayo Saka in particular, look exhausted. The loss to Bayern saw Thomas Partey, Emile Smith Rowe and Fabio Vieira left as unused substitutes, and questions have been …