New Newcastle United update on 'minor' Alexander Isak injury ahead of West Ham United

Isak was forced off with a head injury after being struck on a head with a James Ward-Prowse free-kick late in Tuesday night’s 2-1 win over Southampton at St James’s Park.

The striker – who felt “groggy” after being struck by the ball – could have to miss Saturday’s home game against West Ham United through concussion protocols.

Speaking after the game, Newcastle head coach Eddie Howe said: “He felt a big groggy taking the ball to his head. I don’t know how bad that is, and I don’t know the concussions protocols.”

Isak, signed for a club-record £60million fee last summer, has issued an update on Instagram ahead of the game. The Sweden international – who returned from a long-term thigh injury last month – said he suffered a “minor head injury” against Southampton.

The 23-year-old posed: “Wembley it is! Great night at St James’s Park as always. Came off with a minor head injury but feeling fine after all.”

Isak, signed for a club-record £60million last summer, had come off the bench to replace Callum Wilson in the second half. Club captain Jamaal Lascelles replaced Isak in added time.

Howe said: "We didn't know what was going on, but we made a sub as soon as we knew Alex wasn't feeling great."

Newcastle are third in the Premier League, while West Ham are in 16th place.