Paul Merson has slammed Arsenal boss Mikel Arteta for an ‘unbelievable’ mistake in the Southampton game and has made a prediction for the Gunners’ trip to Manchester City. The former Gunner believes Arteta made a ‘big mistake’ by keeping Jorginho on the bench instead of Fabio Vieira, which he believes gave Southampton a huge advantage. Merson believes Arsenal have the players to hurt Manchester City, but warned that they cannot afford to play gung-ho football. He predicts a 1-1 draw, with Manchester City needing to win both their games in hand to take the lead in the title race. Arsenal have failed to pick up a victory in their last three Premier League matches, and will be hoping to learn from their mistakes and get a result against City.