A hat-trick from Diego Costa ensured Chelsea maintained their outstanding start to the season.
The Spanish international netted in the 45th, 56th and 67th minutes and his latest goal-scoring extravaganza was by far the best yet.
After seemingly finding his feet in recent weeks, where a single goal would do, now the former Atletico Madrid striker appears to be firing on all cylinders, and that can only be an ominous sign for Chelsea's Premier League rivals.
Debutant Loic Remy scored Chelsea's fourth, before a late Jonjo Shelvey strike painted a picture of a slightly more even contest.
It all looked so different when John Terry put through his own goal after just 11 minutes, but Costa had other ideas, with the sublime Cesc Fabregas on his best assist-duty to set up his first two goals.
The result means Chelsea are currently three points clear of the second-placed Swans.