10-man West Ham on Sunday evening defeated visiting Chelsea by 3-1 at the London Stadium courtesy of goals by Nayef Aguerd, Michail Antonio and Lucas Pacqueta.
Nigerian-born Camey Chukwuemeka scored Chelsea’s only goal in the 28th minute of the feisty London derby.
New boy Moises Caicedo became just the second player to give away a penalty on his Premier League debut for Chelsea, after Wayne Bridge against Liverpool in August 2003.
Chelsea’s coach Mauricio Pochettino kicked off his Blues tenure last weekend with a 1-1 draw against Liverpool at Stamford Bridge. Despite not picking up all three points, there were plenty of positives for Pochettino to take from his first match as head coach.
Chelsea have won just one of their last 14 Premier League games (D5 L8) and are winless in six since a 3-1 win at Bournemouth in May (D3 L3).
The Blues have also lost four consecutive Premier League London derbies for the first time.