Taking on a West Ham United team in impressive form looked like a real test for Jose Mourinho's men, but Chelsea eased to a 2-0 victory.
John Terry scored the opener at Stamford Bridge and Diego Costa chalked up his 13th goal of the Premier League campaign to put the three points beyond doubt.
It was no more than Chelsea deserved with the Blues having 65 percent of possession and managing 28 shots (nine on target) to the Hammers' six (none on target).
The chasing pack managed to keep time with the leaders as Manchester City and Manchester United both registered 3-1 wins over West Brom and Newcastle United respectively, but the Chelsea players were happy with their day's work.
Great boxing day win for us, time to go relax— Don John Obi Mikel (@DRealMikel) December 26, 2014
It is somewhat amusing that Mikel stressed the need to relax having only played for seven minutes as a substitute, replacing Oscar with the game decided.
Cesar on the other hand turned in another energetic 90 minutes and managed to keep the dangerous Stewart Downing quiet all afternoon.