The new Champions League campaign is set to get underway soon, with Arsenal looking to make plenty of progress in the latest edition of the competition. There are some key changes that Mikel Arteta will have to get to grips with though, should the Gunners progress into the latter rounds. One of those is the removal of the group stages in favour of a league phase, which will put all of the teams into one large table. Arsenal will then face off against eight different opponents – two from each pot with four games at the Emirates Stadium and four games away. At the end of that, the Gunners will h…