West Ham's forward Marko Arnautovic has been ruled out for up to a month with a hamstring injury sustained in Tuesday's 3-1 win over Cardiff City at the London Stadium.
Manager Manuel Pellegrini confirmed Marko Arnautovic will be out injured until the new year.
The five-goal forward suffered a muscle injury late on in the first half of Tuesday night's clash with Cardiff.
Pellegrini said: "Marko will probably be out for around one month. We know how important he is for the team."
Pellegrini also ruled midfielder Jack Wilshere out of Saturday's visit of Crystal Palace due to an ankle injury.