It wasn't long ago when you'd have been hard pressed to pick out a genuine leader and undroppable defender at Arsenal. But now, the very same players who have received so much criticism are thriving in Mikel Arteta's new 3-4-3 formation - a system that provides greater protection, shielding and solidity. The formation has worked well in well recent times, with the north Londoners producing some of their finest performances - and indeed results - of the season so far. But another hugely tough...