Athletic Bilbao B routed West Ham United U21 4-0 in a dominant Premier League International Cup performance on December 4, 2025. The Basque visitors were in scintillating form, delivering a masterclass in pressing and finishing to overwhelm the young Hammers. Bilbao's famous philosophy of developing local talent was on full display as their B team controlled the match from start to finish, scoring goals at key intervals to build an insurmountable lead. For West Ham U21, it was a harsh lesson in European competition, with the heavy defeat impacting their goal difference and group position significantly.