Former Premier League striker Chris Sutton says he "does not know what West Ham are" after the club's difficult start to the season under Julen Lopetegui.
West Ham are 14th in the Premier League with just 11 points from their opening 10 matches.
Sutton says Lopetegui, who succeeded David Moyes at the end of last season, could be under "major pressure" if results do not improve soon.
"West Ham this season are stuck between the devil and the deep blue sea, you don't know what they are and that's the issue," Sutton told the Monday Night Club on BBC Radio 5 Live.