Eden Hazard scored his 100th and one hundred and first Chelsea goals as Maurizio Sarri's men moved back into the Premier League prime four by grinding out a 2-1 win at Watford on Boxing Day.
Two of the 3 goals came in first-half stoppage time because the Belgian's opener was quickly cancelled out by Roberto Pereyra's spectacular strike.
However Hazard made sure he was the match-winner as he was brought down by ben Foster and then converted the resulting spot-kick early in the last half to move Chelsea 2 points ahead of Arsenal in the battle for Champions League qualification.
Despite fuming at Chelsea's lack of focus in losing at Stamford Bridge for the first time in charge of the Blues to Leicester on Saturday, Sarri named the same starting line-up with Hazard once more serving as the point of interest of the attack ahead of Olivier Giroud and Alvaro Morata.
Hazard had to wait for his possibilities to come, however showed why Sarri persists with him through the center as he nervelessly rounded Foster to provide Chelsea the lead.
Until that time Willian had the visitors' solely clear chance when he also rounded the keeper but could solely strike the post from a narrow angle.
And Watford will believe they were well deserve their equaliser simply a minute after falling behind.
Jose Holebas's corner absolutely picked out Pereyra on the edge of the Chelsea box and the Argentine connected sweetly on the volley to find the underside corner.
The hosts had claims for a penalty waved away when Gerard Deulofeu tumbled under a shoulder barge from David Luiz, however there was no argument when at the other finish moments later Hazard was hauled down by Foster.
Hazard picked himself up to dispatch the penalty confidently and by the end Chelsea's margin of triumph should have been bigger.