West Ham earned their first three points at home in the Premier League this season after defeating Manchester United 3-1 at the London Stadium to condemn José Mourinho's men to a fourth defeat of the season and a second in as many games.
Felipe Anderson scored his first league goal in claret and blue since joining for a club-record fee of £36m in the summer, to put the hosts in front before Andriy Yarmolenko's strike took a wicked deflection off Victor Lindelöf to double the lead before half-time.
Substitute Marcus Rashford then flicked home following a corner to reduce the deficit for the visitors, but Marko Arnautoviu0107 slotted in to restore the east London side's two-goal lead and seal the victory, piling the misery on the Old Trafford club, who were beaten by Championship side Derby County in the Carabao Cup in midweek.