Kepa Arrizabalaga won't have had many better days under Frank Lampard. At the end of a week when the goalkeeper's epitaph was written, Chelsea's back four did their best to fight his corner.
If anyone was unsure how deep their defensive rot has set in, a calamitous opening 27 minutes proved beyond doubt that Kepa's floundering frailties sit only atop a lengthy list of problems.
There was nothing Willy Caballero could do to stop Chelsea gift-wrapping West Bromwich a 3-0 lead. A spirited comeback partially masked the cracks and illustrated why even the most expensive forward lines are only as good as the foundations beneath.