Thiago Silva’s thumping header and a late Tammy Abraham double earned Chelsea a 3-0 home victory against West Ham United.
The Brazilian centre-back leapt unchallenged to give his side the lead on 10 minutes, meeting Mason Mount's corner with a powerful header that gave Lukasz Fabianski no chance.
Timo Werner missed a good chance at the other end after Christian Pulisic set him up just before the break.
West Ham pushed hard in the second half but Abraham doubled Chelsea's lead on 78 minutes when he flicked Werner's scuffed shot into the net.
Abraham then pounced on a loose ball to sidefoot in the Blues' third with 10 minutes left.
That made it the eighth time Chelsea have scored at least three goals in a Premier League match this season, and they nearly had a fourth when Werner struck the crossbar with two minutes left.
Chelsea move up to fifth, on 25 points, while West Ham are 10th on 21.
Chelsea: 26 Dec v Arsenal (A)
West Ham: 27 Dec v Brighton (H)
Referee: Chris Kavanagh. Assistants: Dan Cook, Sian Massey-Ellis. Fourth official: Simon Hooper. VAR: David Coote. Assistant VAR: Nick Hopton.