James McClean’s late equaliser earned West Brom a share of the points as they refused to accept defeat at Chelsea.
The Blues went ahead when Cesar Azpilicueta turned in fellow full-back Branislav Ivanovic’s low cross.
Craig Gardner’s skimming shot levelled, but it seemed Chelsea had done enough when Gareth McAuley prodded Willian’s cross into his own net.
But when the home defence failed to clear McClean made them pay with a pinpoint shot into the bottom corner.
The Republic of Ireland international’s leveller was the final twist in an often ill-tempered game with Chelsea striker Diego Costa at the centre of several flashpoints, including a confrontation with several West Brom players after the final whistle.