West Ham took a giant step towards preserving their Premier League status as David Moyes' side claimed a 1-0 win against Manchester United at the London Stadium.
A howler from David de Gea allowed the Hammers to take a first half lead, with the United goalkeeper allowing Said Benrahma's effort to squirm through his grasp.
Benrahma's strike would prove the difference as West Ham secured the narrow win to move seven points clear of the relegation zone with three games to play.
Man United remain fourth in the Premier League but could face a nervy end to the season as Liverpool chase down the Champions League places.