Bayern's huge numbers meet the meanest defence they have faced this season. Kompany's side live on territory and volume, but when an opponent has hit their high line early, they have conceded. Arsenal concede very little, have a scoring route that already beat Bayern last time, and arrive as Bayern lose two important pieces on the same night.
Bayern's game is clear: about two-thirds of the ball and more than twenty shots a game, with Kane dropping to feed the runners and Luis Díaz finishing (four goals in three games). They also win plenty of corners. The weak spot shows when the press is beaten: Augsburg scored in the first minute and Viking scored twice off very little, both by going straight at the space behind.
Arsenal under Arteta are the opposite profile: about 0.8 expected goals conceded per game and six clean sheets in ten. The Konsa-Gabriel pair, standing in for Saliba, already kept a clean sheet together at Forest. Their goals tend to come in the second half, once opponents tire, and set pieces are a real second route. In the last meeting, Timber headed in a Saka corner and a late break finished it.
The matchup that tilts it is Bayern's build-up against Arsenal's press. Kimmich is reported out after a family bereavement, and Olise is suspended. That takes away the deep playmaker who also delivers set pieces, and the main creator on the right. Bayern's live route moves to Díaz and the left, but the new midfield pairing and the new right side have not played this level together.
I expect Bayern to start fast and Arsenal to absorb it. If it's level at the break, the space behind Bayern's line and Arsenal's late substitutes become the main story.
That's why I'm siding with Arsenal: their own defensive structure and the mechanism that won the last meeting point their way, and the draw is covered as a real outcome between two sides this close.