Yarmolenko suffered the injury in Saturday's 1-0 defeat against local rivals Tottenham Hotspur at the London Stadium and had surgery on Monday.
2018 SeasonAll times ET
Tottenham Hotspur secured a hard-fought 1-0 win over lowly London rivals West Ham United thanks to a deft first-half finish from Erik Lamela.
West Ham United have suspended a youth team coach for attending a march organised by the Democratic Football Lads Alliance on Saturday.
Brighton and Hove Albion moved clear of the Premier League's relegation zone after beating West Ham 1-0 thanks to a Glenn Murray goal.
Mexico international Javier "Chicharito" Hernandez has returned to training with West Ham after recovering from a bout of glandular fever.
Daniel Sturridge has endured a rough few years with injuries and so-so loans but his superb goal vs. Chelsea showed he still has lots to offer.
Jose Mourinho's team selection and tactics baffled, resulting in a desperate defeat to a West Ham side that was inspired by its front three.
Jose Mourinho dropped Alexis Sanchez from his squad for the game, but Paul Pogba started after their training ground row.
Slaven Bilic, who has also spent spells in charge of Croatia, Lokomotiv Moscow and Besiktas, signed a three-year deal on Thursday.
West Ham managed to wrestle a point from Sunday's derby against Chelsea, though they should've claimed all three points.
|Brighton & Hove Albion||9||3||2||4||-3||11|
|West Ham United||9||2||1||6||-6||7|