A defeat that comes in the most humiliating way- in the hands of a team rock bottom of the EPL table.
It seems the international break affected the synergy of the team with most of the Chelsea players active during the break.
Chelsea had taken the lead in the 27th minute after Pulisic latched on to a ricochet from a Marcos Alonso freekick.
Things took a new turn when two minutes later, Thiago Silva got his marching order for a soft but rash challenge just in front of the box.
The dismissal turned to the visitor's favour immediately as West Brom grew in momentum and hot two quick goals become the break.
Despite dominating the game in the second 45, the visitors were sharp on the counter and hit Chelsea twice again in the break.
Mason Mount reduced the deficit with an easy tap in from a Werner assist, but West Brom was not done scoring.
Callum Robinson added another to get his brace in the dying minutes to make it 5-2, a heavy defeat for Tuchel.
Before this game, Chelsea had not conceded in 8 homes matches, and West Brom has never won Chelsea at Stamford Bridge.
Eduoard Mendy was on a clean sheet spree but conceding 5 at once now puts a taunt to his good records.
A clean sheet today would have taken him just one more shy from equalling Man City's Ederson who tops the clean sheet list.
But after shipping in five goals today, he remains in the second spot and could drip to third at the end of the week.
Can Mendy still win the Golden Glove this season after today's performance?
Content created and supplied by: Elnino_Jr (via Opera News )