Mohammed Kudus has been handed a five-match ban by the Football Association after his red card against Tottenham last month.
The Ghana international was involved in an altercation with Micky van de Ven.
What happened?
Kudus was initially given a yellow card before VAR upgraded the offence to a red.
The incident occurred late in the Hammers' defeat to their London rivals.
Why it matters for Mohammed Kudus
The former Ajax man will miss West Ham's next five matches, including games against Everton and Arsenal.
Kudus is alleged to have acted in a "violent and improper manner" towards the Dutch defender.
The ban is a significant blow to West Ham's midfield.
What comes next?
Kudus will miss matches against Newcastle, Leicester, and Wolves.
The West Ham man will be out for an extended period, starting with the match against Everton.
And the Hammers will have to cope without their key midfielder for several fixtures.
But the FA's decision is final, and Kudus will have to serve his ban.
So the Ghana international will have to wait before returning to action.
The five-match ban is a dated statistic as of the FA's confirmation.