Guus Hiddink stormed to the first win of his second spell at Chelsea as the reigning Premier League champions displayed some of their old prowess in a 3-0 triumph at Crystal Palace.
Oscar put the Blues ahead against the run of play, tapping home after being put through by Diego Costa.
Once they scored Chelsea dominated, deservedly doubling their advantage with a spectacular Willian strike.
Costa sealed the win with a tap-in for a goal his performance deserved after Palace failed to clear Willian’s shot.
Interim boss Hiddink, who guided Chelsea to third in the Premier League, a Champions League semi-final and the FA Cup in his first spell at the club, remains unbeaten since taking over from Jose Mourinho last month.
The Blues’ four-match run without defeat is their longest this season and moves last year’s champions to 14th in the league, still 12 points adrift of a Champions League spot.