A howler from David de Gea gifted West Ham victory over Manchester United to boost their chances of Premier League survival and deal a blow to the Red Devils' top-four hopes.

De Gea let a tame Said Benrahma effort from distance slip through his grasp to put the Hammers in front midway through the first half.

The win moved David Moyes' side seven points clear of the relegation zone with a superior goal difference to all the sides below them.

Fourth-placed Manchester United missed the chance to move above Newcastle into third as they remain just a point ahead of Liverpool in fifth, with a game in hand.

Tomas Soucek twice went close for the home side after the break as they pushed for a second, while Michail Antonio had a goal disallowed for a foul on De Gea.

Marcus Rashford and Antony both struck the post early on for the visitors, who started the brighter of the two teams but faded after the opening goal.

Substitute Anthony Martial came closest to an equaliser in stoppage time, but Lukasz Fabianski palmed away his rasping effort from a tight angle.