Arsenal are preparing for a week of challenges on the road in the Premier League and the Champions League. First, the Gunners will travel to Milan to battle Inter at the San Siro on match day four of the new European format. Then, Mikel Arteta will march his side across London to face Chelsea at Stamford Bridge, in what is poised to be a blockbuster. It’s been a while since Arsenal headed into a clash with the Blues behind the West Londoners in the table, with the fixture a must-win for Arteta’s squad. READ MORE: Gary Neville shares honest thoughts on Arsenal winning the league after Newcastle…