Chelsea battled back from 3-0 down at half-time to claim a share of the spoils against the Baggies, thanks to second-half strikes from Mason Mount, Callum Hudson-Odoi and Tammy Abraham.
Chelsea boss Frank Lampard has revealed West Brom’s third goal scored from a corner frustrated him the most.
Explaining why he wasn’t unhappy with the goal which was conceded from a cornerkick, Lampard said: “When I spoke about mistakes before, I was relating to the set-piece goal because that’s not something that is difficult [to defend].
“Sometimes when you analyse goals from open play, there are many different factors such as what happens in certain areas higher up the pitch. But at a set-piece, when you are asked to mark a man then you have to mark a man, simple as that. If you let a man roll off the back of you to a score a goal, that’s a clear mistake.”
Chelsea left-back Marcos Alonso failed to mark Kyle Bartley, who scored West Brom’s third goal.