Tough scene: Gyökeres receives a painful injury at San Mamés! | OneFootball

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A concerning head injury to a key player overshadowed Arsenal's opening UEFA Champions League fixture against Athletic Bilbao, casting a pall over what was otherwise a historic night for the Spanish hosts.

The alarming incident occurred in the first half when striker Viktor Gyökeres and defender William Saliba collided in a devastating moment of miscommunication.

The impact left Gyökeres with a significant head wound that required immediate medical intervention. After extensive treatment on the pitch to stem the bleeding, the Swedish international remarkably continued play, returning to action with his head wrapped in a substantial bandage.

While Arsenal dealt with this setback, Athletic Bilbao carved their name into the competition's history books. On a night marked by concern for the Gunners' attacker, the Spanish side accomplished a remarkable European feat not achieved by any club from Spain since the tournament's inaugural season back in 1955.