Arsenal begin their Champions League campaign with a challenging trip to San Mamés, facing an Athletic Club side eager to make a statement in their first appearance in the competition since 2014.

Both teams have started their domestic seasons strongly, but key injuries—especially the absence of Nico Williams for Athletic and Martin Ødegaard for Arsenal—could shape the outcome.

With Mikel Arteta’s men aiming to build on last season’s semi-final run, this opening clash promises intensity, tactical battles, and a test of squad depth.

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