The Frenchman moved to London Stadium from Chelsea this summer in a deal worth £29.8m.
Zouma signed a contract until the summer of 2025 reportedly worth £125,000-a-week.
According to The Sun, Zouma's sizeable contract has "not gone down particularly well with other players."
David Moyes has a created a tight-knit group in east London, which is one of the reason's for West Ham's success last season.
The Hammers have qualified for the Europa League this season.
Their first group stage game is next Thursday against Dinamo Zagreb.
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