West Ham stunned Liverpool as they secured a huge victory that moved them above their opponents into third in the Premier League and dented the Reds' title hopes.
Liverpool went into this game looking to set a new club record of 26 league games unbeaten, as well as get a win that would move them up to second and within a point of leaders Chelsea.
But they fell behind early on when Alisson, under pressure from Angelo Ogbonna, flapped at Pablo Fornals' corner and succeeded only in helping the ball into his own goal.
Both sides were then fortunate not to be reduced to 10 men in a scrappy first half, with Aaron Cresswell catching Jordan Henderson with a heavy challenge before Ogbonna was hit in the face by a stray Diogo Jota elbow that resulted in the West Ham defender having to be substituted.