Despite West Brom making it difficult for Chelsea to break them down, Diego Costa fired Chelsea to victory.
West Brom manager Tony Pulis revealed after the game that Chelsea defeated West Brom due to Gareth McAuley’s mistake.
Pulis said: “It’s disappointing because Gareth [McAuley] has got to deal with it.
“He’s made a mistake and we move on. We don’t really want to criticise anyone.
“Our structure and organisation was very good. One mistake, one chance and the fella puts it away – that’s the difference in quality that separates the teams at the top.”