West Ham United boss Sam Allardyce faces stiff competition for Werder Bremen centre-forward Marko Arnautovic.

The Austria international was linked with the Hammers over the weekend.

However, if Allardyce is to deal in Arnautovic, he will have to fight off competition from Real Sociedad and Valencia for his signature.

Arnautovic, 24, played 27 games for Werder last season, scoring five goals.