Much was expected of the Austria international when he arrived at the London Stadium, but the former Werder Bremen attacker has failed to make a big impact for Slaven Bilic’s side.
Arnautovic, who can also operate as a forward, has yet to score or provide one assist in the Premier League for the Hammers.
The attacker was booed off when he was substituted during West Ham’s 3-0 defeat to Brighton and Hove Albion at the London Stadium in the Premier League on Friday evening.
According to The Telegraph, West Ham co-owners Sullivan and Gold are concerned about the form of the former FC Twente star.
“But the club are alarmed at the start to the season and, in particular, the form of Bilic’s big summer signings – especially Marko Arnautovic who has struggled since his move from Stoke City for a fee which could rise to £24million.”