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West Ham boss Sam Allardyce has been dealt a huge injury blow after striker Diafra Sakho was ruled out for up to a month.

Sakho has been a huge part of the Hammers' remarkable start to the campaign after equalling a Premier League record of scoring in each of his opening six games.

But the Senagalese forward went off in the final minute of West Ham’s win over Manchester City with a shoulder injury.

Sakho will go for a scan on Monday but it is believed West Ham fear he will be out for around a month with the problem.

That will be a huge blow for West Ham while they also wait for England striker Andy Carroll to make his return from a pre-season ankle injury.

West Ham 2-1 Man City in pictures:

Meanwhile, City striker Sergio Aguero could be facing a ban and trial by television from the Football Association.

TV pictures showed that he caught West Ham midfielder Mark Noble with a late challenge which enraged Allardyce.

But the officials did not appear to spot the incident which means Aguero could be hit with retrospective punishment.