West Ham co-owner David Sullivan has backed manager Slaven Bilic and called for the club to "stick together" after the 5-1 defeat by Arsenal on Saturday.
West Ham are one point above the relegation zone after not winning any of the last five Premier League games.
Sullivan said the 48-year-old did an "amazing" job in his first season in charge, as the club finished seventh.
"Slaven cares passionately and this defeat will be hurting him as much as anyone," he told the club website.
"I have no doubts that he is doing everything he can to address the situation and everyone is working together to ensure we turn our season around.