The Italian was forced to retire in the first half after suffering a cut over his eye after a collision with Diogo Jota, but that incident came minutes after medical personnel treated his knee.
Ogbonna fell after his boot appeared to get caught in the grass at the London stadium as he ran back to defend himself against Mohamed Salah.
The 33-year-old man underwent a scan Monday that revealed the bad news and will now see a specialist to determine the extent of the damage. ACL injuries can take up to nine months to recover if surgery is required, although that’s unclear at this stage.
West HamChief Medical Officer Richard Collinge said: “After being replaced following a separate incident that led to a cut above the eye, Angelo felt some discomfort in his right knee, so we scanned him to determine the extent of injury.
“That scan showed some damage to the anterior cruciate ligament and we have started his rehabilitation immediately. Angelo will see another specialist this week and then we’ll have a clearer picture of his recovery timeline. “
David Moyes has options on Craig Dawson, who replaced Ogbonna and impressed in the win over Liverpool, or Issa Diop to get in, but has relied on an established team for his Premier League success so far this season having made just four. changes to your starting eleven. in 11 games. .