Uncoachable. That’s how Gary Neville described Arsenal’s defence back in November. Unai Emery had just been sacked as the Arsenal manager after a tumultuous 18 months in charge that saw them lose to Chelsea in the Europa League final and miss out on Champions League football once again. Unai Emery struggled during his time in England Neville’s comments were difficult to argue with at the time. A defence consisting of David Luiz, Shkodran Mustafi and Sokratis Papastathopoulos at its core and...