Burnley boss Sean Dyche rued defensive mistakes as Chelsea kept their bandwagon rolling with a win at Turf Moor.
Frank Lampard's side notched up a seventh straight win in all competitions through Christian Pulisic's hat-trick and a Willian strike that put them four goals to the good midway through the second half.
Late strikes from Jay Rodriguez and Dwight McNeil gave the scoreline some semblance of credibility, following a spirited Burnley display.
Dyche told the club's website: It was an odd night in that I don't think there was too much in the game, especially in the first half.
We've created some good chances, but we ended up 2-0 down when mistakes were punished.
It's poor from us for giving the ball away in those positions, and credit to them for taking those chances, but you come in 2-0 down and scratching your head.
Then we started the second half quite bright and took the game on again, but we gave away a third and then it's really tough.
At four it certainly didn't feel like a 0-4 game, because we created some really good chances tonight and that's pleasing."
