Arsenal faces significant injury challenges ahead of their Champions League clash against Bayern Munich at the Allianz Arena. Key defender William Saliba is sidelined with a back injury, not expected back until November 21, potentially missing a long run of games including a fixture against Newcastle. Piero Hincapie, dealing with an ankle issue, and Christos Tzolis, recovering from a hamstring problem, are also out, though both are targeting a return by November 1, possibly for a match against Liverpool. Martin Zubimendi, however, is reported fit after a minor ankle concern. Bayern Munich also has absentees, with Michael Olise suspended and Jamal Musiala highly unlikely to feature due to a thigh problem. Kim Min-jae is a fresh doubt, while Manuel Neuer is expected to return from a foot issue. These defensive absences pose a significant selection dilemma for Arsenal's manager.