Club record signing Oliver McBurnie scored the only goal early in the second half, following a glaring mistake by West Ham substitute goalkeeper David Martin.
Manuel Pellegrini lost his job on Saturday, with West Ham only a place and a point above the relegation zone after a loss to Leicester.
Goals from Gabriel Martinelli, Pierre-Emerick Aubameyang and Nicholas Pepe helped Arsenal snap their nine-match winless streak.
West Ham’s surprise win at Chelsea on Saturday bought Pellegrini some time but the heat is back on the Chilean coach after his side slipped to a sixth defeat in nine Premier League games.
West Ham registered their first win at Stamford Bridge in 17 years after Aaron Creswell scored the sole goal of the game in the second half.
Son Heung-min, Lucas Moura and Harry Kane scored in a 13-minute span around halftime at the Olympic Stadium, with Tottenham having a spark to its play rarely seen in the final months of Mauricio Pochettino’s reign.
Bernard scored from a tight angle in the first half and substitute Gylfi Sigurdsson added a late second from distance as Everton beat West Ham 2-0 Saturday in the Premier League to ease the pressure on manager Marco Silva.
West Ham now have 11 points in six matches — after three wins from four — Manchester United are three points worse off.
The win keeps fifth-placed United two points behind Chelsea, with Tottenham a further point ahead.
Southampton's 2-1 comeback win over Tottenham extended Spurs' winless streak in the competition to four games.
Liverpool are still top of the Premier League by three points despite being held 1-1 by West Ham on Monday after also drawing with Leicester in the previous game.
West Ham lost to third-tier AFC Wimbledon 4-2 in the FA Cup on Saturday, with Arnautovic left out of the matchday squad.
West Ham beat Arsenal 1-0 at the Olympic Stadium to dent their chances of making it to a Champions League qualification place.
Nasri has been without a club since leaving Antalyaspor of Turkey in January and previously played in the Premier League for Arsenal and Manchester City.
Big-spending West Ham slumped to its fourth straight defeat to open the English Premier League after conceding an injury-time goal to Wolverhampton Wanderers.
The Indian cricket players are making the most of their off-time by witnessing Premier League matches after making an impressive comeback to win the 3rd Test at Nottingham.
The Gunners came from behind to beat West Ham 3-1 on Saturday, with the help of a fortuitous own-goal.
Mohamed Salah set Liverpool on its way to a 4-0 victory over West Ham in an assertive start to the Premier League season by Juergen Klopp's side.
Wilshere, who has 34 senior caps and two goals, was unable to win a place in England's World Cup squad which made him make the decision to leave the club.
Moyes arrived in November on a contract until the end of the season, and guided West Ham out of the relegation zone to a 13th-place finish on Sunday.
Top News
Latest News
