Overview

• Both clubs enter Matchday 2 targeting their first victory of the Champions League group stage.
• The game is at Signal Iduna Park, where the Yellow Wall of roughly 25,000 will face an away contingent of about 4,000 Athletic supporters.
• Borussia Dortmund remain unbeaten at the start of this season, according to local reporting.
• Athletic have struggled for goals, with one scored across five September matches as reported by El Correo.
• Borussia Dortmund amplified the buildup by posting a Basque-language message referencing the Yellow Wall on social media.