West Ham United striker Marko Arnautovic has confirmed that he will be out for “a while” after limping off in the club’s win against Cardiff.

The forward has taken to Instagram to send a message to West Ham fans, letting them know that it is a serious injury and that he vows to come back stronger.

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Arnautovic came off during West Ham’s 3-1 win over Cardiff, a game in which Lucas Perez started up front and scored twice.

Javier Hernandez scored twice at the weekend, with West Ham’s strikers currently enjoying a good run of form.

However, Arnautovic will still be a big loss to Manuel Pellegrini’s side, with it expected that he will be out until next year.

He is thought to have suffered a hamstring injury, but there has been no official confirmation of exactly how long he will be out of action for.