Manchester United dropped to fourth in the Premier League after being held to a goalless draw by West Ham.
The visitors had the better chances in the contest, hitting the post twice in quick succession through Mauro Zarate followed by Winston Reid's header.
Zarate dragged an effort wide in the second half and Marouane Fellaini forced Adrian into a smart save.
Striker Anthony Martial struck a shot narrowly wide as the hosts failed to break down West Ham.
Louis van Gaal's side have conceded just once at home in the league all season, but their problems lie at the other end of the pitch, where they found the target only once from 20 efforts against the Hammers. It meant they missed the chance to go second and take advantage of rivals Manchester City's 2-0 loss at Stoke.
It could have been worse, though, had midfielder Bastian Schweinsteiger been sent off for raising his arm at West Ham defender Reid in the first half - the incident went unpunished by the referee.