West Ham United headed to Liverpool on Wednesday looking to protect their five-match unbeaten run in all competitions.
However, Darwin Núñez's 22nd minute header settled the game 1-0 in the Reds' favour and condemned the Hammers to a sixth Premier League defeat of the season. The Uruguayan nodded forcefully home after being picked out by Konstantinos Tsimikas' left-wing cross, giving Łukasz Fabiański no chance.
Jarrod Bowen had the chance to level on the stroke of half-time when referee Stuart Attwell, after a VAR review, awarded a penalty for a foul by Joe Gomez on the No20. However, Alisson dived to his right to repel the England forward's spot-kick.
And the Brazil goalkeeper made another vital late stop to deny Tomáš Souček, leaving the Hammers feeling frustrated by another narrow defeat at Anfield.
View a gallery of images from Merseyside by clicking on the image above.