Arsenal have taken to the training pitch for the final time before they fly to Italy for their Champions League clash with Atalanta. The Gunners make the trip to Bergamo in search of their first three points in the brand new Champions League league phase, which is a change from the original group stages. Mikel Arteta will have to manage his squad effectively, with an increase in fixtures from six to eight, as well as some tougher opposition. In Atalanta, Arsenal take on the previous winners of the Europa League, with a side who are more than capable of causing some problems. While there was a …