By John Cross Mikel Arteta has a few selection dilemmas ahead of Arsenal’s crunch Champions League showdown with Bayern Munich. Who will start on the left wing? Will Jorginho partner Declan Rice in midfield? And will it be Takehiro Tomiyasu, Jakub Kiwior or Oleksandr Zinchenko at left-back? But maybe there is a clue in Arteta’s thinking from who was on pre-match media duties. UEFA rules state that the clubs must put up the manager and a player for the media 24 hours before kick-off in the city where the match is hosted. Leandro Trossard faced the cameras for UEFA’s official pre-match press c…