Frank Lampard admitted that he expects fans to be 'worried' after Chelsea suffered their fifth straight defeat after his appointment as caretaker manager against Brentford on Tuesday evening.
The Blues failed to score for the sixth game in their last seven and saw their woeful record continue after conceding two to hand their west London rivals the win.
Club captain Cesar Azpilicueta netted an own goal and a Bryan Mbeumo strike late on likely condemned Chelsea to a bottom-half finish for the first time since 1996.
Chelsea, who have seen four managers in the dug-out this season, have not won since their 3-1 victory over relegation-threatened Leicester in early March.