Optimism is high at Arsenal in wake of a decent summer on the transfer front and a solid win in their first Premier League game of the season. The Gunners have bolstered their defensive ranks with the signing of Riccardo Calafiori and look set to make a key midfield addition in the coming days. Reports have suggested that Mikel Merino is closing in on a move to Arsenal and there may even be a breakthrough by Thursday. Several players have also left the Emirates Stadium this summer and there could yet be more outgoings before deadline day on 30 August. Ally McCoist has now spoken about an Arsen…