Chelsea were held to 1-1 draw by West Ham in Saturday’s London Derby, as the Blues struggle to find a fitting form under Graham Potter.
Joao Felix gave Chelsea the lead in the 16the minute, after having an earlier goal ruled out for odd side.
Kai Havertz thought he had doubled the lead, but celebrations were halted following an off side call.
A few minutes later, Emerson bagged an equalizer for the home side, with his first Premier League goal.
Chelsea, who have dropped 14 points in the last seven top-flight matches, failed to take their chances and now sit at 9th on the log.
Already out of the both the FA Cup and Carabao Cup, The Blues will resume their Champions League campaign against Borussia Dortmund on Wednesday, as they hope to improve on their form.