West Ham United injury news and updates on Kurt Zouma, Issa Diop and Angelo Ogbonna

West Ham face the most important week of the season with key players fighting for fitness.

West Ham United face the biggest week of their season, when they travel to Chelsea with their top four ambitions hanging by a thread ahead of a huge Europa League semi-final clash.

The Hammers have certainly enjoyed another brilliant season where they have gone shoulder to shoulder with some of the best clubs in England.

Recently they have looked flat in the league - highlighted by the defeat to Brentford - even though part of that has been down to their continental commitments.

Kurt Zouma of West Ham United reacts as he appears to be injured during the Premier League match (Photo by Warren Little/Getty Images)

The draw with Burnley left the Hammers seventh in the league table, making it almost impossible to climb over Tottenham and Arsenal.

David Moyes is experienced enough to know that the week could cement his legacy or end what has been a very encouraging season, but he will need to do without some of his trusted players who have been on the treatment table.

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The Hammers are somewhat paying for not investing in the squad - even though they have done incredibly well to still reach the last four of the Europa League while still fighting for important spots in the league.

The club have remained silent on the length of injuries to their key players but LondonWorld has been doing its homework and brings you the latest on the treatment table at the club’s Rush Green training centre.

Angelo Ogbonna of West Ham United celebrates their side's victory after the Premier League match (Photo by Jan Kruger/Getty Images)

Angelo Ogbonna

Ogbonna was the very first blow the Hammers suffered at the start of the season against Liverpool.

The Italian defender had formed a rock solid partnership with Zouma and just before he could enjoy his season his knee gave up.

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He has since had surgery and has been ruled out of the rest of the season, but in his absence Craig Dawson has stepped up and is doing a remarkable job.

Expected return: Early next season

Issa Diop of West Ham United United celebrates after scoring their sides second goal (Photo by Justin Setterfield/Getty Images)

Issa Diop

The French defender’s injury has thrown the club into chaos, after he appeared to have twisted his ankle in the late stages of the 1-1 against Burnley.

Diop himself has only just come into the team because of the injury to fellow French international Kurt Zouma but initial diagnoses are not looking good.

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The club have remained tight lipped about his situation with this week potentially being a season decider.

It will be interesting to see who David Moyes picks for the crucial game against Chelsea on Sunday.

Expected return: Unknown

Kurt Zouma of West Ham United reacts as he appears to be injured during the Premier League match (Photo by Warren Little/Getty Images)

Kurt Zouma

Incredibly unlucky to have come off against Brentford and missed the all-important win against Lyon.

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It’s now looking like a test of character on how far West Ham can go without their best defender, and even though they went to Lyon and battered them you’d think they will need the French defender back if they are to go all the way.

Expected return: Still being assessed