Thomas Tuchel suffered first defeat as Chelsea manager after a scandalous 2-5 defeat in the hands of West Brom.
Christian Pulisic gave Chelsea the lead in the 27th minute after scoring from a Marcos Alonso freekick to make it 1-0.
Things went from good to bad as Thiago Silva was sent off in the 29th minute after a bad tackle.
West Brom pulled back level 1-1 in the 42nd minute through Matheus Pereira fine finish.
The Baggies immediately scored another shocking goal to make it 2-1 in the 49th minute which came through Pereira.
West Brom made it 3-1 in the 63rd minute after Callum Robinson scored with an amazing counter attack.
Chelsea were unable to make anything happen in the game as the scoreline became 4-1 thanks to Mbaye Diagne.
Mason Mount was able to make it 4-2 in the 71st minutes after an attack saw Timo Werner beating a defender and sending the ball to him.
Callum Robinson put the nail on the coffin for Thomas Tuchel’s side after scoring a late goal which saw things ended with 2-5.
Watch Highlight Below