Piers Morgan has had a real go at Arsenal manager Mikel Arteta after he made a claim about the size of his squad yesterday. The Gunners have had an up-and-down season so far. They were on top of the Premier League table at Christmas, but following a run of difficult results, they’re now third, five points behind leaders Liverpool. Arteta and his men have a lot of work to do. Piers Morgan slams Arsenal’s Mikel Arteta for speaking ‘nonsense’Arsenal take on Nottingham Forest tonight in a game they will be hoping to win. Mikel Arteta‘s side have had plenty of rest, having played just two games thi…