Declan Rice scored his first goal in West Ham when Arsenal's four best hopes were dented after defeat at the London stadium
The result means that Manchester United will move hand in hand with the men of Unai Emery with a win at Tottenham on Sunday and could even overtake Arsenal should win for three or more goals.
The old arsenal Samir Nasri started his first Premier League game for West Ham against his former team and almost made an assist in the first half when he showed great composure to keep the ball up and lay it out to Felipe Anderson on the edge of the box.
West Ham went close to opening the scoring when Rice went wide when he was unmarked from a corner just before the interval.
But the 1
Arsenal was not able to pick up a clear response, even if the top scorer, Pierre Emerick-Aubameyang, fired when he could have done better
Alexandre Lacazette had a double chance At the start, Matteo Guendouzi's 25-meter effort flew wide but Arsenal struggled to exert sustained pressure.
Alex Iwobi shook the post with a low shot, but Arsenal did not score for the first time in 21 Premier League games.  West Ham rider Manuel Pellegrini took Marko Arnautovic to the disadvantage for Andy Carroll to the 71 & # 39; and the Austria forward, who reportedly moved to China, He seemed to greet the faithful at the London stadium.
West Ham in eighth place – point level with Leicester in seventh